Answer:
The answer is 9x
Explanation:
First get rid of the parentheses and think of it as combining your like terms.
2x and 7x are like terms, and 3y and -3y are like terms.
your new equation would look like this... 2x + 3y +7x - 3y
2x + 7x = 9x
3y - 3y = 0
So your answer is 9x