13=u/2+9

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Solution for 13=u/2+9 equation: 



13=u/2+9

We move all terms to the left:

13-(u/2+9)=0

We get rid of parentheses

-u/2-9+13=0

We multiply all the terms by the denominator


-u-9*2+13*2=0

We add all the numbers together, and all the variables

-1u+8=0

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

-u=-8

u=-8/-1

u=+8

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