-7(39-1)=91

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Solution for -7(39-1)=91 equation: 


Simplifying
-7(39 + -1) = 91

Combine like terms: 39 + -1 = 38
-7(38) = 91

Multiply -7 * 38
-266 = 91

Solving
-266 = 91

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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