24x + 12 = -60
24x = -60 - 12
24x = -72 | : 24
x = -3
25 - 2x = 5
-2x = 5 - 25
-2x = -20 | : (-2)
x = 10
-28 + 7x = 21
7x = 21 + 28
7x = 49 | : 7
x = 7
1/3x - 5 = 21
1/3x = 21 + 5
1/3x = 26 | * 3
x = 78
1/12x - 3 = 7
1/12x = 7 + 3
1/12x = 10 | * 12
x = 120
1/7x - 5/7 = 8/7 | * 7
x - 5 = 8
x = 8 + 5
x = 13