-13=u/9-8

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Solution for -13=u/9-8 equation: 



-13=u/9-8

We move all terms to the left:

-13-(u/9-8)=0

We get rid of parentheses

-u/9+8-13=0

We multiply all the terms by the denominator


-u+8*9-13*9=0

We add all the numbers together, and all the variables

-1u-45=0

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

-u=45

u=45/-1

u=-45

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