Respuesta :

animegirlori

Answer:

-1

Step-by-step explanation:

-9a(-16+3)=4a ; solve for whole numbers first.

-9a-(13)=4a ; A negative 16 plus a positive 3 is 13.

-9a-4a=13 ; Switch 13 and 4a to make it easier to solve.

-13a=13 ; Now divide each side by -13.

a=-1

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