1：X×2+5=15
2：6X+5=11
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
50:2x-8=8
51:4x-3*9=29
52:8x-3x=105
53:x-6*5=42
54:x+5=7
55:2x+3=10
56:12x-9x=9
57:6x+18=48
58:56x-50x=30
59:5x=15
60:78-5x=28
61:32y-29=3
62:5x+5=15
63:89x-9=80
64:100-20x=20
65:55x-25x=60
66:76y-75=1
67:23y-23=23
68:4x-20=0
69:80y+20=100
70:17:85y+1=-86
71:18:45x-50=40
72:5x=15
73:78-5x=28
74:32y-29=3
75:5x+5=15
76:89x-9=80