x-21=-12

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Solution for x-21=-12 equation: 


Simplifying
x + -21 = -12

Reorder the terms:
-21 + x = -12

Solving
-21 + x = -12

Solving for variable 'x'.

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

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

Combine like terms: -21 + 21 = 0
0 + x = -12 + 21
x = -12 + 21

Combine like terms: -12 + 21 = 9
x = 9

Simplifying
x = 9

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