Relax

Respuesta :

Answer:

-1 + 63x - 49a

Step-by-step explanation:

Following order of operations rules:

1*5 = 5

Next, 5 - 6 = -1, and so we now have -1 + 7(9x - 7a).

Apply the distribution rule for multiplication next, obtaining -1 + 63x - 49a

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