9-3y=-12

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Solution for 9-3y=-12 equation: 


Simplifying
9 + -3y = -12

Solving
9 + -3y = -12

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '-9' to each side of the equation.
9 + -9 + -3y = -12 + -9

Combine like terms: 9 + -9 = 0
0 + -3y = -12 + -9
-3y = -12 + -9

Combine like terms: -12 + -9 = -21
-3y = -21

Divide each side by '-3'.
y = 7

Simplifying
y = 7

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