-4+1=13

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Solution for -4+1=13 equation: 


Simplifying
-4 + 1 = 13

Combine like terms: -4 + 1 = -3
-3 = 13

Solving
-3 = 13

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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