## Algebra: A Combined Approach (4th Edition)

x = $-\frac{31}{2}$
9x + 3(x - 4) = 10(x - 5) + 7 Distribute: 9x + 3x - 12 = 10x - 50 + 7 Combine like terms: 12x - 12 = 10x - 43 Subtract 10x from both sides: 2x - 12 = -43 Add 12 to both sides: 2x = -31 Divide both sides by 2: x = $-\frac{31}{2}$