-12+x=-21

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Solution for -12+x=-21 equation: 


Simplifying
-12 + x = -21

Solving
-12 + x = -21

Solving for variable 'x'.

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

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

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

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

Simplifying
x = -9

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