Question 763302
3*(x - 4) = 33
Expanding the parentheses

3*x - 3*4 = 33

3*x - 12 = 33

Adding 12 to both sides

3*x = 33+12 = 45

Dividing both sides by 3 (to cancel out the 3 on the left hand side)

x = 45/3 = 15

Proved :)