-7=2u+5u

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Solution for -7=2u+5u equation: 



-7=2u+5u

We move all terms to the left:

-7-(2u+5u)=0

We add all the numbers together, and all the variables

-(+7u)-7=0

We get rid of parentheses

-7u-7=0

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

-7u=7

u=7/-7

u=-1

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