5(x - 3) = 15
mutiply the bracket by 5
(5)(x)= 5x
(5)(-3)= -15
5x-15= 15
move -15 to the other side
sign changes from -15 to +15
5x-15+15= 15+15
5x= 15+15
5x= 30
divide by 5 for both sides
5x/5= 30/5
Answer: x= 6
