-8u=13-9u

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



-8u=13-9u

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-8u+9u-13=0

We add all the numbers together, and all the variables

u-13=0

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

u=13

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