simplify the expression

Answer:
8x - 4y
Step-by-step explanation:
First: solve the parentheses
8x - 7y - (3-6y)
Second: combine like terms (terms that both have y or x, or other variable)
8x - 7y - (-3y)
Third: there are no more like terms, so you are left with this as your answer
8x - 4y