【精品】初一数学解方程题大集合
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三.解下列方程.
1.x+1.5-
859x =0 2.
32y -314y =2-652y 3.
41(1-23x)-31(2-4x )=2 4.
32[23(41x-21)-3]-2=x 5.2.05
.13x -03.01.02.0x =2.5
6.4x -3(20-x)=6x -7(9-x) 7.
)12(43)]1(31[21x x x 8.43(1)323322x x 9.
2233554x x x x 10.1-2(2x+3)=-3(2x+1) 11.
312y
-1= y 12.23
y +y =867y 13. 4.06.0x +x = 3.011.0x 14.7x +6=8-3x 15
,4x -3(20-x)=6x -7(9-x) 16,5y
-2
1y =1-52y 17,2.188.1x -233.1x =3.04.05x 18,321264
x
x 19,
133221x x 20,413x -675x = 1 21,
2x -13-5x -16=1 22,x x 5)2(3423,122312x x 24,2462
31x
x x
25,3)20(34x x 26,163231
2x x x
27,6x -7=4x-5 28,13232
1
x x 29,327132)()(y y
30,63542133x x x
31,
34153x x ---= 32, 2x-31=612x -1 33,72
(3x +7)=2-1.5x 34,
312x -615x =1 35,80% ·x =(x +22)·75% 36,124
4323x
37,
2323132x x 38,)2(3)87(x x x 39,)4(3223
x x 40,
32221x x x 41,)35(2)
57(15x x x 42,1815612x x 43,183
131y y 44
,102.003.018.05.0x x 45,)
35(2)57(15x x x 46,1
8
15612x x 47,183131y y 48,1
02
.003.018.05.0x x (1)3(x-2)=2-5(x-2)
(2) 2(x+3)-5(1-x)=3(x -1) (3)3(1)2(2)23
x x x (4) 3(2)1(21)x x x (5)2x -13 =x+2
2 +1
(6) 12131x (7) x
x 38
(8) 12542.13x x (9 )
310.40.3
42
x x (10) 3142125x x (11) 312
57
243
y y (12)576132x x (13)1
43321m
m (14) 52221y y y (15)121
36
x x x (16) 38123x x (17) 1
2(x-3)=2-12(x-3)
(18)35.012.02x x (19) 3
01.032.01x x (20)
223146x x (21)124362x x x
(22)
x x 23231423(23) 112[(1)](1)
223x x x (24)27(3y+7)=2 - 32y
(25)23312x x
(26)3[2(x+1)-8]-2x -7=1(27)33126923x x x (28)x
x x 4
.013.08.037.01(29);(30);(31)
;(32);(33)
(34);
(35);
(36);
(37);
(38);(39);
(40)(41)
(42);(43)
;
(44);(45);
(46);(47)