Complete the solution of the equation. find the value of y when x equals 4.
-3x+9y=-57

-3x + 9y = -57        x = 4

-3*4 + 9y = -57

-12 + 9y = -57

9y = -57 + 12

9y = 12 - 57

9y =-45          Divide through by 9.

y = -45/9

y = -5

Hope this helped.

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