-12=4-21

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Solution for -12=4-21 equation: 


Simplifying
-12 = 4 + -21

Combine like terms: 4 + -21 = -17
-12 = -17

Solving
-12 = -17

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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