1.4x = 40
2.x + 1 = 4
3.x + 29 = 45
4.3x = 36
5.3x = 51
6.5x = 135
7.4x = 4
8.x + 2 = 16
9.x + 2 = 20
10.x + 29 = 49
11.x + 11 = 31
12.x + 24 = 32
13.3x = 78
14.x + 1 = 16
15.x + 1 = 29
16.x + 1 = 19
17.5x = 80
18.3x = 6
19.6x = 24
20.x + 17 = 23