Question

Como calcular 9x-3(2x+2)=15

Answer 1

9x - 3(2x + 2) = 15
X = $\frac{21}{3}$ = 7

Answer 2

9x-3(2x+2)=15
9x-6x-6=15
9x-6x=15+6
3x=21
x=21/3
x=7