6 + -3x = 5x + -10x + 18
First, combine any like terms. The only like terms are: 5x and -10x
5x + -10x = 5x - 10x = -5x
6 + - 3x = -5x + 18
Add 3x to both sides.
6 = -2x + 18
Subtract 18 from both sides
-12 = -2x
Divide both sides by -2
6 = x
