Which of the following is equivalent to the expression below? (6 x - 4 y + 9) + ( - 3 x - 2 y)

3x - 6y + 9

Step-by-step explanation:

Given

(6x - 4y + 9) + ( - 3x - 2y)

Since both parenthesis are distributed by 1, just remove them, that is

= 6x - 4y + 9 - 3x - 2y ← collect like terms

= (6x - 3x) + ( - 4y - 2y) + 9

= 3x - 6y + 9