-31=4u-7

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Solution for -31=4u-7 equation: 



-31=4u-7

We move all terms to the left:

-31-(4u-7)=0

We get rid of parentheses

-4u+7-31=0

We add all the numbers together, and all the variables

-4u-24=0

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

-4u=24

u=24/-4

u=-6

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