13=u/3-13

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Solution for 13=u/3-13 equation: 



13=u/3-13

We move all terms to the left:

13-(u/3-13)=0

We get rid of parentheses

-u/3+13+13=0

We multiply all the terms by the denominator


-u+13*3+13*3=0

We add all the numbers together, and all the variables

-1u+78=0

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

-u=-78

u=-78/-1

u=+78

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