34=13+7u

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Solution for 34=13+7u equation: 



34=13+7u

We move all terms to the left:

34-(13+7u)=0

We add all the numbers together, and all the variables

-(7u+13)+34=0

We get rid of parentheses

-7u-13+34=0

We add all the numbers together, and all the variables

-7u+21=0

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

-7u=-21

u=-21/-7

u=+3

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