5-21=-4

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Solution for 5-21=-4 equation: 


Simplifying
5 + -21 = -4

Combine like terms: 5 + -21 = -16
-16 = -4

Solving
-16 = -4

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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