-12=y+21

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Solution for -12=y+21 equation:


Simplifying
-12 = y + 21

Reorder the terms:
-12 = 21 + y

Solving
-12 = 21 + y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
-12 + -1y = 21 + y + -1y

Combine like terms: y + -1y = 0
-12 + -1y = 21 + 0
-12 + -1y = 21

Add '12' to each side of the equation.
-12 + 12 + -1y = 21 + 12

Combine like terms: -12 + 12 = 0
0 + -1y = 21 + 12
-1y = 21 + 12

Combine like terms: 21 + 12 = 33
-1y = 33

Divide each side by '-1'.
y = -33

Simplifying
y = -33

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