一元一次方程20道练习题
(1)5x+2=7x-8; (2)
72x134x123x210
;
1x42; (4)0.8x0.10.5x0.7;
(3)
2x1153x17xx42x3x2; (6)36; (5)2(7)
x12x3x11463
2x1x2162; ; (8)65x173; (9)6 (10)
72y1112y22y1223
(11)
3x13x5x41123462
(12)
2(2x1)0.220x2.53.50.010.2
(13)
x2x34x235
(x5) (14)
4x1.55x0.81.2x30.50.20.1
1xx2(15)x—3=6—1
0.4y0.9y50.30.2y (16)0.5—2=0.3
(17)
1.88x1.33x5x0.41.220.3
; (18)
0.4x0.90.1x0.50.030.02x0.50.20.03
(19)
2x5
(x1)30%(100x)25%; (20)
233x23xx(1)3236
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