Inactive Tutor answered 03/04/14
Tutor
New to Wyzant
x12
x-3
This can be rewritten as;
x12 ÷ x-3
remember that xa ÷ xb is the same as x(a-b)
so we'd have;
x(12-(-3))
which becomes;
x(12 + 3)
which gives;
x15