#### Answer

x = $-\frac{31}{2}$

#### Work Step by Step

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 = $-\frac{31}{2}$