-y+9=12

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Solution for -y+9=12 equation:


Simplifying
-1y + 9 = 12

Reorder the terms:
9 + -1y = 12

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

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

Combine like terms: 12 + -9 = 3
-1y = 3

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

Simplifying
y = -3

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