Respuesta :

Answer:

distribute -5 and -4

Step-by-step explanation:

-5(-6x-9y)-4(-10x+7y)

(30x + 45y) - (- 40x + 28)

30x + 45y + 40x - 28

45y + 70x - 28

30x-45y+40x-28y
70x-78y