Question

3 - 2( x + 3) = x - 18

Answer 1

3 - 2*(x + 3) = x - 18
3 - 2x - 6 = x - 18
-2x - x = -18 + 6 - 3
-3x = -15
x = 5

Espero que entenda ;)

Answer 2

3-2(x+3)=x-18
3-2x-6=x-18
-2x-x=-18+6-3
-3x=-15
x=-15 dividido por -3 =5
x=5