Respuesta :

Answer:

y = -4

Step-by-step explanation:

-3 - 4y = 9 - y

Add 3 to both sides

-4y = 9 - y + 3

-4y = 12 - y

Add y to both sides

-4y + y = 12

-3y = 12

Divide both sides by -3

y = -4

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