4+-13=57

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Solution for 4+-13=57 equation: 


Simplifying
4 + -13 = 57

Combine like terms: 4 + -13 = -9
-9 = 57

Solving
-9 = 57

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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