Question

Resolva a Equação 9x -3 (2x+2)=15

Answer 1

$9x-6x-6=15\\\\ 3x=15+6\\\\ 3x=21\\\\ \boxed{x= \frac{21}{3}=\boxed{7}}$

Answer 2

9x-6x-6=15
3x=15+6
3x=21
x=21/3
x=7