X+-12=-21

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Solution for X+-12=-21 equation: 


Simplifying
X + -12 = -21

Reorder the terms:
-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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