13=2u-7

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Solution for 13=2u-7 equation: 



13=2u-7

We move all terms to the left:

13-(2u-7)=0

We get rid of parentheses

-2u+7+13=0

We add all the numbers together, and all the variables

-2u+20=0

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

-2u=-20

u=-20/-2

u=+10

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