1y-21=-12

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Solution for 1y-21=-12 equation: 


Simplifying
1y + -21 = -12

Reorder the terms:
-21 + 1y = -12

Solving
-21 + 1y = -12

Solving for variable 'y'.

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

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

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

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

Divide each side by '1'.
y = 9

Simplifying
y = 9

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