7x - 5x + 3 - x (Distribute)
x + 3 (Combine like terms)
x = -3 (Subtract three from both sides)
Collect like terms
(7x - x) - 5(x - 3)
Simplify
6x - 5(x - 3)
Expand
6x - 5 + 15
(6x - 5x) + 15
x + 15
