Worked Examples
5x + 8 = 2x + 20
Subtract 2x from both sides
3x + 8 = 20
Subtract 8
3x = 12
Divide by 3
x = 4
4x - 7 = x + 11
Subtract x
3x - 7 = 11
Add 7
3x = 18
Divide by 3
x = 6
2x + 3x - 4 = 21
Combine like terms
5x - 4 = 21
Add 4
5x = 25
Divide by 5
x = 5