第1个回答 2013-08-30
1.5x+2=52 解:5x=52-2 5x=50 x=50÷5 x=10
2:6X+5=11 解:6x=11-5 6x=6 x=6÷6 x=1
3:X-0.8X=6
4:19y+y=40
5:25-5x=15
6:79y+y=80
7:42x+28x=140
8:3x-1=8
9: 90y-90=90
10: 80y-90=70
11: 78y+2y=160
12: 88-x=80
13: 9-4x=1
14: 20x=40
15: 65y-30=100
16: 51y-y=100
17: 6X-3X=18
18: 1.5x+18=3x
19: 5×3-x÷2=8
20: 0.273÷x=0.35
21: 1.8x=0.972
22: x÷0.756=90
23: 9x-40=5
24: x÷5+9=21
25: 48-27+5x=31
26: 10.5+x+21=56
27: x+2x+18=78
28: (200-x)÷5=30
29: (x-140)÷70=4
30: 0.1(x+6)=3.3×0.4
31: 4(x-5.6)=1.6
32: 7(6.5+x)=87.5
33: (27.5-3.5)÷x=4
34: 3X+5X=48
35: 14X-8X=12
36: 6x5+2X=44
37: 20X-50=50
38: 28+6X=88
39: 32-22X=10
40: 24-3X=3
41: 10X(5+1)=60
42: 99X=100-X
43: X+3=18
44: X-6=12
45: 56-2X=20
46: 4y+2=6
47: x+32=76
48: 3x+6=18
49: 16+8x=40