21-Y=-12

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Solution for 21-Y=-12 equation: 


Simplifying
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 = -33
-1Y = -33

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

Simplifying
Y = 33

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