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    五年级解方程练习题180题及答案

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    五年级解方程练习题180题及答案
    五年级解方程 (1 (0.5+x+x=9.8 - 2

    (2 2(X+X+0.5=9.8

    (3 25000+x=6x

    (4 3200=440+5X+X

    (5 X-0.8X=6

    (612x-8x=4.8

    (7 7.5+2X=15
    (81.2x=81.6

    (7 x+5.6=9.4

    (10x-0.7x=3.6
    (12 X+8.3=10.7     (13 15x= 3     (14 3x -8= 16     (15 3x+9=27     (16 18(x-2=270     (17 12x=300-4x     (18 7x+5.3=7.4     (19 3x -     5=4.8     (25 0.5x+8=43     (26 6x-3x=18 1



    (1191 . x= 1.3 (27 7(6.5+x=87.52



    五年级解方程练习题

    (28 0.273 - x=0.35180题及答案
    (29 1.8x=0.972

    (30 x -
    0.756=90

    (31 0.1(x+6=3.3     X0.4
    (32 (27.5-3.5 - x=4 (33 9x-40=5


    (34 x -
    5+9=21 (35 48-27+5x=31

    (36 10.5+x+21=56 (37 x+2x+18=78 (38 (200-x - 5=30
    (39 (x-140 - 70=4
    (40 20-9x=2     (41 x+19.8=25.8     (42 5.6x=33.6 (43 9.8-x=3.8     (44 75.6-x=12.6 (45 5x+12.5=32.3     (46 5(x+8=102     (47 x+3x+10=70     (48 3(x+3=50-x+3     (49 5x+15=60     (50 3.5-5x=2     (510.3X7+4x=12.53














    (52 x - 1.5-1.25=0.75 (53 1.3X6=2.6 (54 6x+12.8=15.8     (55     150X2+3x=690     (56     20=4 (57 3x+6=18 (58 2(2.8+x=10.4 (59 (x-3 - 2=7.5 (60 13.2x+9x=33.3 (61 3x=x+100     (62
    (63
    6x+18=48 (64 3(x+2.1=10.5 4x-(65
    12x-9x=8.7 (66
    13(x+5=169 (67
    2x-97=34.2     2x-(68
    3.4x-48=26.8 (69
    42x+25x=134 (70
    1.5(x+1.6=3.6 (71
    2(x-3=5.8 (72
    65x+7=137 (73 9x+4 X 2.5 = 91 (74 4.2 x+2.5x = 134
    4


    五年级解方程练习题 180题及答案
    x+4.8=7.25




    (75 10.5x+6.5x=51

    (76 89x-43x=9.2

    (77 5x-45=100



    (78 1.2x- 0.5x=6.3

    (79 23.4=2x (80 4x-
    x=48.6

    (814.5x-x=28 (82X-5.7=2.15



    (83 5X-2X=18

    (84 3X+0.7=7

    (85 3.5 X 2= 4.2+x

    (86 26 X 1.5= 2x+10
    (870.5X16—16X 0.2=4x (88 13 9.25 — X=0.403 (89 18.9-X=0. 3 (90 23x=14x + 27     (91x+ 14x=75 (92 95 ——5x= 80     (93 1.8+6x = 54 (94 6.7x —60.3 = 6.7 (95 9 + 4x = 53 (96 2x+8=16     (97 20x-14x=24 (74 4.2 x+2.5x = 134(98x+7x=8 6





    (99 9x-3x=6 (100 6x-8=4

    (101 5x+x=9

    (102 8x-8=6x 4 4 Y=9n

    5


    (104 2x-6=12 (105 7x+7=14



    (106 6x-6=0

    (107 5x+6=11

    (108 2x-8=10



    (109 2.5x-8=4


    3 (110 x-3=7 4     (1113x+7=28 (112
    3x-7=26 (113
    9x-x=16 (114
    24x+x=50 (115
    1.2x-8=4 (116
    3x-8=31 (117
    6x+6=12 (118
    3x-3=3 (119
    5x-3x=4 (120
    2x+16=19     (1215x+8=19 7


    五年级解方程练习题 180题及答案

    (122 14-6x=8

    (123 15+6x=27

    (124 5-8x=4

    (125 7x+8=15

    (126 9-2x=1 (127 4+5x=9

    (128 10-x=8 (129 8x+9=17



    (130 9+6x=15

    (131x+9x=4+7 (132 2x+9=17

    (133 8-4x=6
    (134 6x-7=28     (135 7x-9=20     (136 x-56=1     (137 8-7x=1     (138x-30=12 (139 6x・2 仁
    21     (140 6x-3=6     (1419x=18     (142 4x-18=14     (143 5x+9=11     (144 17-2x=11     (145 x+4+8=23 8


    五年级解方程练习题 180题及答案
    (146
    7x-12=9 (147
    X-5.7=2.15     (148 5X-2X=18 (149
    3X +0.5=5 (150
    3.5X2=4x     (15126X1.5= 2x (152 0.5X16—16X0.仁
    4x (153 9.26 - X=0.402 (154
    36.9 - X=0.3 (155
    X - 0.5=2.6 (156 93 — 5x= 80
    (157 180-6X = 54     (1589+ 4x= 40 (159 0.2x— 0.4+ 0.5= 3.7 (160 9.4x— 0.4x= 16.2 (16192- 4x= 20 (162
    7x - 6=1.4 (163
    16x+ 34x=1     (164 18x- 14x=12 (165 3x — 42 - 14=15 (166 12+ 4x=56 (167 22 — 14x=129


    五年级解方程练习题 180题及答案

    (168 X+8.3=10.7

    (169 5x= 30 (170 x-
    5.6=9.4



    (171 x - 0.8=90

    (172 3x— 8= 16 (173 3x+9=27     (174 5.3+7x=7.4 (175 3x - 5=4.8

    (176 X-0.8X=6
    (177 12x+8x=4.8 (178 7(x-2=49     (1794X8+2x=36     (180 (x-2 - 3=7     (181 x - 5+9=21     (182(300-x - 5=30     (18391 - x= 1.3    (18441-3x=17





    10

    五年级解方程练习题180题及答案

    五年级解方程180题答案
    (1 (0.5+x+x=9.8 - 2 0.5+2x=4.9 0.5+2x-0.5=4.9-0.5 2x=4.4 2x - 2=4.4 - 2 X=2.2 (22(X+X+0.5=9.8 2x+2x+1=9.8 4x+1-1 =9.8-1 4x=8.8 4x 十 4=8.8 十 4 X=2.2 ⑶ 25000+x=6x 25000+x-x=6x-x 5x=25000 5x - 5=25000 - 5 X=5000 (4 3200=440+5X+X 6x+440=3200 6x+450-450=3200-440 6x=2760 6x — 6=2760 — 6 X=460 ⑸ X-0.8X=6 0.2x=6 0.2x - 0.2=6 - 0.2 X=30 (6
    12x-8x=4.8     4x=4.8 4x 十 4=4.8 十 4 X=1.2 (7
    7.5+2X=15
    X=3.75 (8
    1.2x=81.6     1.2x - 1.2=81.6 - 1.2     X=68 (9 x+5.6=9.4 X+5.6-5.6=9.4-5.6 X=3.8 (10 x-0.7x=3.6 0.3x=3.6 0.3x —0.3=3.6 —0.3 X=12 (11 91 -x=1.3 91 - x x x=1.3 x x 1.3x=91 1.3x- 1.3=91 - 1.3 X=70 (12 X+8.3=10.7 X+8.3-8.3=10.7-8.3 X=2.4 (13
    15x =3 15x - 15=3-15 X=0.2 (14 3x-8 = 16 3x-8+8=16+8 3x=24 3x - 3=24- 3 X=8 (15 3x+9=27 3x+9-9=27-9 3x=18 3x-3=18-3 3x=6 (16 18(x-2=270 1


    五年级解方程练习题180题及答案
    2x+7.5-7.5=15-7.5 2x=7.5 2x - 2=7.5 - 21



    五年级解方程练习题180题及答案
    18x=306 18x - 18=306- 18 X=17 (17 12x=300-4x 12x+4x=300-4x+4x1



    五年级解方程练习题 180题及答案
    16x=300 16x - 16=300 . 16 X=18.75 (18
    7x+5.3=7.4 7x+5.3-5.3=7.4-5.3 7x=2.1 7x -7=2.1 -7 X=0.3 (19 3x - 5=4.8 3x-5X 5=4.8 X 5 3x=24 3x - 3=24 - 3 X=8 (2030 - x+25=85 30 - x+25-25=85-25 30 - x=60 30 -xX x=60 X x 30=60x 60x - 60=30 - 60 X=0.5 (21
    1.4 X 8-2x=6 11.2-2x+2x=6+2x 11.2=6+2x 2x+6-6=11.2-6 2x=5.2 2x 十 2=5.2 十
    X=2.6 (22
    6X-12.8 X 3=0.06 6x-38.4=0.06 6x=38.46 6x - 6=38.46 十 6 X=6.41 (23
    410-3x=170     410-3x+3x=170+3x     170+3x=410 3x+170-170=410-170 3x=240 3x - 3=240 - 3 X=80 (24
    3(x+0.5=21 3x+1.5=21 3x+1.5-1.5=21-1.5 3x=19.5 3x — 3=19.5— 3 X=6.5 (25
    0.5x+8=43 0.5x+8-8=43-8 0.5x=35 0.5x — 0.5=35 — 0.5
    X=70 (26
    6x-3x=18 3x=18 3x -3=18-3 X=6 (27
    7(6.5+x=87.5     7x+45.5=87.5     7x+45.5-45.5=87.5-45.5 7x=42 7x -7=42 -7 X=6 (28
    0.273     - x=0.35     x=0.273 —0.35     X=0.78 (29
    1.8x=0.972 1.8x - 1.8=0.972-     1.8     X=0.54 (30
    x - 0.756=90 x - 0.756 X 0.756=90 X 0.756 X=68.04 (31
    0.1(x+6=3.3     X0.4 0.1x+0.6=1.32 0.1x+0.6-0.6=1.32-0.6 0.1x=0.72 0.1x -0.1=0.72 -0.1 X=7.2 (32 (27.5-3.5 - x=4 24 -x=4 x=24 十
    4     X=6 (33
    9x-40=5 9x-40+40=5+40 9x=45 9x 十9=45十
    14


    五年级解方程练习题 180题X=5 及答案
    (34 x - 5+9=21 x 十
    5+9-9=21-9 x -5=12 x — 5X 5=12X5 X=60 (35
    48-27+5x=31 5x+21-21=31-21 5x=10 5x 十 5=10+ 5 X=2 (36 10.5+x+21=56 x+31.5-31.5=56-31.5 x=24.5 (37
    x+2x+18=78 3x+18-18=78-18 3x=60 3x + 3=60 + 3 X=20 (38
    (200-x     + 5=30 (200-x + 5X 5=30X 5     200-x=150 200-x+x=150+x 150+x=200 X+150-150=200-150 X=50 (39 (x-140 +70=4 (x-140 + 70 X 70=4 X 70 X-140=280 X-140+140=280+140     X=420 (40
    20-9x=2 9x=20-2 9x=18 9x +9=18+9 X=2 (41
    x+19.8=25.8     X+19.8-19.8=25.8-19.8     X=6 (42
    5.6x=33.6 5.6x + 5.6=33.6 + 5.6
    X=6 (43 9.8-x=3.8 9.8-x+x=3.8+x 3.8+x=9.8 X=9.8-3.8 X=6 (44
    75.6+ x=12.6 X=75.6
    +12.6     X=6 (45 5x+12.5=32.3 5x+12.5-12.5=32.3-12.5 5x=19.8 5x + 5=19.8 + 5 X=3.96 (46
    5(x+8=102 5x+40=102 5x+40-40=102-40     5x=62 5x + 5=62 + 5 X=12.4 (47
    x+3x+10=70 4x+10=70 4x+10.10=70-10 4x=60 4x + 4=60 + 4 X=15 (48
    3(x+3=50-x+3 3x+9=53-x 3x+x+9-9=53-x+x-9 4x=44 4x + 4=44 + 4 X=11 (49 5x+15=60 5x+15-15=60-15 5x=45 5x + 5=45 + 5 X=9 (50 3.5-5x=2 3.5-5x+5x=2+5x 5x+2=3.5
    15


    五年级解方程练习题 180题及答案
    5x+2-2=3.5-2 5x=1.5 5x 十
    5=1.5+ 5     X=0.3     (510.3X7+4x=12.5 4x+2.1=12.5 4x+2.1-2.1=12.5-2.1     4x=10.4 4x 十 4=10.4 十 4 X=2.6 (52 x- 1.5-1.25=0.75 x- 1.5-1.25+1.25=0.75+1.25 x - 1.5=2 x - 1.5 X 1.5=2 X 1.5 X=3 (53
    4x13X6=2.6     4x-1.3 X 6+1.3 X 6=2.6+1.3X6     4x=10.4 4x 十 4=10.4 十 4 X=2.6 (54
    6x+12.8=15.8     6x+12.8-12.8=15.8-12.8     6x=3 6x —6=3 — 6 X=0.5 (55
    150X2+3x=690     3x+300=690 3x+300-300=690-300 3x=390 3x -3=390 - 3 X=130 (56 2x-20=4 2x-20+20=4+20 2x=24 2x 十 2=24 十
    2 X=12 (57 3x+6=18 3x+6-6=18-6 3x=12 3x -3=12-3 (58
    2(2.8+x=10.4 5.6+2x=10.4 2x+5.6-5.6=10.4-5.6 X=4
    2x=4.8 2x 十 2=4.8 十
    2     X=2.4 (59 (x-3 - 2=7.5 (x-3 -2X 2=7.5 X 2 X-3=15 X=18 (60
    13.2x+9x=33.3 22.2x=33.3 22.2x - 22.2=33.3 - 22.2 X=1.5 (613x=x+100 3x-x=x-x+100 2x=100 2x 十 2=100+ 2 X=50 (62
    x+4.8=7.2     X=7.248 X=2.4 (63 6x+18=48 6x+18-18=48-18 6x=30 6x — 6=30* 6 x=5 (64 3(x+2.1=10.5 3x+6.3=10.5 3x=10.5-6.3 3x=4.2 3x * 3=4.2 * 3 X=1.4 (65
    12x-9x=8.7     3x=8.7 3x * 3=8.7 * 3 X=2.9 (66 13(x+5=169 13x+65=169 13x+65-65=169-65 13x=104 13x * 13=104 * 13
    16

    五年级解方程练习题 180题X=8 及答案 (67 2x-97=34.2 2x-97+97=34.2+97 2x=131.2 2x 十 2=131.2+ 2 X=65.6 (68 3.4x-48=26.8 3.4x-48+48=26.8+48 3.4x=74.8 3.4x - 3.4=74.8 - 3.4 X=22 (69 42x+25x=134 67x=134 67x -67=134-67 X=2 (70
    1.5(x+1.6=3.6 1.5x+2.4=3.6 1.5x=3.6-2.4 1.5x=1.2 1.5x -1.5=1.2-1.5     X=0.8 (71 2(x-3=5.8 2x-6=5.8 2x-6+6=5.8+6 2x=11.8 2x 十 2=11.8+ 2 X=5.9 (72 65x+7=137 65x+7-7=137-7 65x=130 65x -65=130-65 X=2 (73
    9x+4 X 2.5 = 91 9x+10=91 9x+10-10=91-10     9x=81 9x 十 9=81 十
    9 X=9 (74 4.2 x+2.5x = 134 6.7x=134 6.7x -6.7=134-6.7 X=20 (75
    10.5x+6.5x=51 17x=51     17x - 17=51 - 17 X=3
    (76
    89x-43x=9.2 46x=9.2 46x     - 46=9.2 - 46     X=0.2 (77 5x-45=100 5x-45+45=100+45 5x=145 5x 十 5=145 + 5 X=29 (78
    1.2x-0.5x=6.3 0.7x=6.3 0.7x - 07=6.3 - 0.7 X=9 (79
    23.4=2x 2x 十 2=23.4 十 2 X=11.7 (80
    4x-x=48.6     3x=48.6 3x — 3=48.6 — 3 X=16.2 (81
    4.5x-x=28     3.5x=28 3.5x — 3.5=28 — 3.5 X=8 (82X-5.7=2.15 X=5.7+2.15 X=7.85 (83
    5X-2X=18 3x=18 3x-3=18-3 X=6 (84 3X+0.7=7 3x+0.7-0.7=7-0.7 3x=6.3 3x — 3=6.3 — 3 X=2.1 (85 3.5X2=4.2+x
    17


    五年级解方程练习题 180题及答案
    4.2+x=7 X=7-4.2 X=2.8 (86
    26 X1.5= 2x+10 2x+10=39 2x+10-10=39-10 2x=29 2x 十 2=29 十 2 X=14.5 (87 0.5X16—16X0.2=4x 4x=4.8 4x + 4=4.8 十
    4     X=1.2 (88 13 9.25 — X=0.403 X=139.25-0.403 X=138.847 (89 18.9 - X=0. 3 X=18.9 -0.3 X=63 (90 23x=14x + 27 23x-14x=14x-14x+27 9x=27 9x 十 9=27 十 9 X=3 (91x+14x=75 15x=75 15x - 15=75-15 X=5 (92 95 — 5x= 80 95-5x+5x=80+5x 5x+80=95 5x+80-80=95-80 5x=15 X=3 (93
    1.8 +6x = 54 6x=54-1.8     6x=52.2 6x - 6=52.2 - 6 X=8.7 (94 6.7x —60.3 = 6.7 6.7x=60.3+6.7 6.7x=67 6.7x - 6.7=67 - 6.7
    X=10 (95 9 + 4x= 53 4x=53-9 4x=44 4x 十 4=44 十 4 X=11 (962x+8=16 2x=16-8 2x=8 2x 十2=8十2 X=4 (97 20x-14x=24 6x=24 6x — 6=24 — 6 X=4 (98x+7x=8 8x=8 X=1 (99 9x-3x=6 6x=6 X=1 (100 6x-8=4 6x-8+8=4+8 6x=12 X=2 (101
    5x+x=9     6x=9 6x —6=9—6 x=1.5 (102
    8x-8=6x 8x-8+8=6x+8 8x-6x=6x-6x+8 2x=8 2x 十2=8十2 X=4 4 5 4
    4 cc 4 VJ.
    -4- 5
    5 5     X=25     (104 2x-6=12 2x-6+6=12+6 2x=18
    18

    五年级解方程练习题 180题及答案
    2x 十 2=18 十 2 X=9 (105 7x+7=14 7X+7-7=14-7 7x=7 7x -7=7-7 X=1 (106
    6x-6=0 6x-6+6=0+6 6x=6 X=1 (107 5x+6=11 5x+6-6=11-6 5x=5 X=1 (108 2x-8=10 2x-8+8=10+8 2x=18 X=9 (109 2.5x-8=4 2.5x-8+8=4+8 2.5x=12 2.5x - 2.5=12 - 2.5 X=4.8 3 (110 x- - =7 4 3 3 3 X- + =7+ 4 4 4 X=7.75 (111 3x+7=28 3x+7-7=28-7 3x=21 3x - 3=21 - 3 X=7 (112
    3x-7=26 3x7+7=26+7 3x=33 3x — 3=33 — 3 X=11 (113
    9x-x=16 8x=16 8x 十 8=16 十
    8 X=2 (11424x+x=50 25x=50 25x - 25=50 - 25
    X=2 (115 1.2x-8=4 1.2x-8+8=4+8 1.2x=12 1.2x 十 1.2=12+ 1.2 X=10 (116 3x-8=31 3x-8+8=31+8 3x=39 3x - 3=39 - 3 X=13 (117 6x+6=12 6x+6-6=12-6 6x=6 X=1 (118 3x-3=3 3x-3+3=3+3 3x=6 3x -3=6-3 X=2 (119
    5x-3x=4 2x=4     2x +2=4 + 2 X=2 (120 2x+16=19 2x+16-16=19-16     2x=3 2x +2=3 + 2     X=1.5 (1215x+8=19 5x+8-8=19-8 5x=11 5x - 5=11 - 5 X=2.2 (122 14-6x=8 14-6x+6x=8+6x 6x+8-8=14-8 6x=6 X=1 (123 15+6x=27
    19


    五年级解方程练习题180题及答6x+15-15=27-15 案 6x=12 6x - 6=12.6 X=2 (124 5-8x=4 5-8x+8x=4+8x 8x+4-4=5-4 8x=1 8x + 8=1 十 8 X=0.125 (125 7x+8=15 7x+8-8=15-8 7x=7 X=1 (126
    9-2x=1 9-2x+2x=1+2x 2x+1•仁9」
    2x=8 2x 十2=8十2 X=4 (127
    4+5x=9 5x+4-4=9-4 5x=5 X=1 (128 10-x=8 X=10-8 X=2 (129 8x+9=17 8x+9-9=17-9 8x=8 X=1 (130 9+6x=15 6x+9-9=15-9 6x=6 X=1 (131
    x+9x=4+7 10x=11 10x+10=11 十 10 X=1.1 (132 2x+9=17 2x+9-9=17-9 2x=8 2x十2=8十2
    X=4 (133 8-4x=6 8-4x+4x=6+4x 4x+6-6=8-6 4x=2 4x十2=2十4 X=0.5 (134 6x-7=28 6x7+7=28+7 6x=36 6x — 6=36 — 6 X=6 (135 7x-9=20 7x-9+9=8+20 7x=28 7x - 7=28 - 7 X=4 (136
    x-56=1 X=56+1 X=57 (137 8-7x=1 8-7x+7x=1+7x 7x+1 •仁 8・1 7x=7 X=1 (138x-30=12 X-30+30=12+30 X=42 (139 6x-21=21 6x21+21=21+21 6x=42 6x — 6=42 — 6 X=7 (140 6x-3=6 6x-3+3=6+3 6x=9 6x— 6=9— 6 X=1.5 (1419x=18 9x 十 9=18 十
    9

    五年级解方程练习题 180题及答案

    (142 4x-18=14 4x-18+18=14+18 4x=32 4x -4=32 - 4 X=8 (143 5x+9=11 5x+9-9=11-9 5x=2 5x 十5=2十5 X=0.4 (144 17-2x=11 17-2x+2x=11+2x 2X+11-11=17-11 2x=6 2x 十2二6十2 X=3 (145 x+4+8=23 X+12=23 X=23-12 X=11 (146 7x-12=9 7x-12+12=9+12 7x=21 7x - 7=21 - 7 X=3 (147 X-5.7=2.15 x=5.7+2.15 X=7.85 (148 5X-2X=18 3x=18 3x -3=18-3 X=6 (149 3X +0.5=5 3x+0.5-0.5=5-0.5 3x=4.5 3x — 3=4.5 — 3 X=1.5 (150 3.5X2=4x 4x=7 4x 十4=7十4 X=1.75 (15126X1.5= 2x 2x=39 2x 十 2=39 十 2 X=18 (152 0.5X16 —16X0.1=4x 4x=6.4 4x 十 4=6.4 十
    4     X=1.6 (153 9.26 — X=0.402 X=9.26-0.402 X=8.858 (154
    36.9 - X=0.3 X=36.9 - 0.3     X=123     (155X-0.5=2.6     X=0.5 X 2.6     X=1.3 (156 93 — 5x = 80 93-5X+5X=80+5X 5X+80-80=93-80 5X=13 5X -5=13-5 X=2.6 (157 180-6x =54 180-6X+6X=54+6X 6X+54-54=180-54 6X=126 6X -6=126-6 X=21 (1589 + 4x = 40 4X+9-9=40-9 4X=31 4X -4=31 - 4 X=7.75 (159 0.2x —0.4 + 0.5 = 37 0.2X-0.5+0.5-0.4+0.4=3.7-0.5+0.4 0.2X=3.6 0.2X - 0.2=3.6 - 0.2 X=18 (160 9.4x — 0.4x= 16.2 9X=16.2 9X -9=16.2-9 X=1.8 (16192 —4x = 20 92-4X+4X=20+4X21




    4X+20-20=92-20 五年级解方程练习题180题及答案
    4X=72     4X -4=72 - 4 (162 X=18 (163
    7x-6=1.4     7x -6X 6=1.4X6 7X=8.4 7X - 7=8.4 - 7 X=1.2 (164
    16x + 34x=1 50X=1     50X     - 50=1 - 50     X=0.02 (165 18x — 14x=12 4X=12 4X-4=12-4 X=3 (166 3 x — 42 - 14=15 3X-3=15 3X-3+3=15+3 3X=18 3X-3=18-3 X=6 (167 12 + 4x=56 4X+12-12=56-12 4X=44 4X -4=44 - 4 X=11 (168
    22— 14x=12 22-14X+14X=12+14X 14X+12-12=54-12 14X=42 14X 十 14=42 十 14 X^3 (169
    X+8.3=10.7 X=10.7-8.3 X=2.4 (170
    5x= 30 5X- 5=30- 5 ~X^6 (171
    x-5.6=9.4 X=15 X=5.6+9.4 (172
    3x —8=     16 3X-8+8=16+8 3X=24 3X - 3=24 - 3 X=8
    (171 x - 0.8=90     X=0.8 X 90     X=72 (173
    3x+9=27 3X+9-9=27-9 3X=18 3X-3=18-3 X=6 (174 5.3+7x=7.4 7X+5.3-5.3=7.4-5.3 7X=2.1 7X-7=2.1 -7 X=0.3 (175
    3x - 5=4.8 3X=4.8 X 5 3X=24 3X -3=24 - 3 X=8 (176
    X-0.8X=6 0.2X=6 0.2X - 0.2=6 - 0.2     X=30 (177
    12x+8x=4.8 20X=4.8 20X - 20=4.8 - 20 X=24 (178
    7(x-2=49 7X-14=49 7X- 14+14=49+14 7X=63 7X - 7=63 - 7 X=9 (179
    4 X 8+2x=36 2X+32=36 2X+32-32=36-32 2X=4 2X - 2=4 - 2
    8


    (180
    (x-2 -3=7 X-2=3 X 7 X-2=21 X=23 (181
    x-5+9=21 X -5=21-9 X -5=12 X=12X5 五年级解方程练习题180 题及答案
    X=300-150 X=150 (18391 -x=1.3 X=91 X=70 (184 41-3x=17 41- -1.3 X=60 (182
    (300-x -5=30     300-X=30 X 5     300-X=150
    3X+3X=17+3X 3X+17- 17=41-17 3X=24 3X - 3=24 - 3 X=8

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