Question

Cit face?
5*(6+2*x)=60

Answer 1

5 * ( 6 + 2 * x ) = 60
6 + 2 * x = 60 : 5 = 12
2 * x = 12 - 6 = 6
x = 6 : 2 
=> x = 3

Answer 2

$\displaystyle 5(6+2x)=60 \\ 30+10x=60 \\ 10x=60-30 \\ 10x=30 \\ x= \frac{30}{10} \\ \boxed{x=3}$