Question

ny answer is 6x - 12y - 5

12x 4 - 11y -6x - 9 -4

Answer 1

This is your original problem. You need to combine like terms.

12x + 4 - 11y - 6x - 9 -y

12x - 6x = 6x
-11y - y = -12y
4 - 9 = -5

So --
6x - 12y - 5