Now,I would get rid of the parenthesis,also remember a double negative is a positive. 6x+ 6y-x+7y Now add or subtract like terms. 5x+13y You can check this by put x as 1 and y as 2, and putting it in to both equation. (I do this, you don't have to) 3(2 +4) - (1- 14) 18+ 13= 31 5 + 26= 31 So it would be 5x+13y.
