7=6u+u

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Solution for 7=6u+u equation: 



7=6u+u

We move all terms to the left:

7-(6u+u)=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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