10(x-2) = -20
Distributing:
10(x) + 10(-2) = -20
10x - 20 = -20
Adding 20 at both sides:
10x - 20 + 20 = -20 +20
10x = 0
Dividing by 10 at both sides:
10x/10 = 0/10
x = 0
