5x + 12 + 3x = 8x + -5
Reorder the terms:
12 + 5x + 3x = 8x + -5
Combine like terms: 5x + 3x = 8x
12 + 8x = 8x + -5
Reorder the terms:
12 + 8x = -5 + 8x
Add '-8x' to each side of the equation.
12 + 8x + -8x = -5 + 8x + -8x
Combine like terms: 8x + -8x = 0
12 + 0 = -5 + 8x + -8x
12 = -5 + 8x + -8x
Combine like terms: 8x + -8x = 0
12 = -5 + 0
12 = -5
Solving
12 = -5