-3y-12=-9

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Solution for -3y-12=-9 equation: 


Simplifying
-3y + -12 = -9

Reorder the terms:
-12 + -3y = -9

Solving
-12 + -3y = -9

Solving for variable 'y'.

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

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

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

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

Divide each side by '-3'.
y = -1

Simplifying
y = -1

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