-7u-6u=91

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Solution for -7u-6u=91 equation: 



-7u-6u=91

We move all terms to the left:

-7u-6u-(91)=0

We add all the numbers together, and all the variables

-13u-91=0

We move all terms containing u to the left, all other terms to the right

-13u=91

u=91/-13

u=-7

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