-(y-12)=-9

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Solution for -(y-12)=-9 equation:


Simplifying
-1(y + -12) = -9

Reorder the terms:
-1(-12 + y) = -9
(-12 * -1 + y * -1) = -9
(12 + -1y) = -9

Solving
12 + -1y = -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 + -1y = -9 + -12

Combine like terms: 12 + -12 = 0
0 + -1y = -9 + -12
-1y = -9 + -12

Combine like terms: -9 + -12 = -21
-1y = -21

Divide each side by '-1'.
y = 21

Simplifying
y = 21

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