12=u/5-9

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Solution for 12=u/5-9 equation: 



12=u/5-9

We move all terms to the left:

12-(u/5-9)=0

We get rid of parentheses

-u/5+9+12=0

We multiply all the terms by the denominator


-u+9*5+12*5=0

We add all the numbers together, and all the variables

-1u+105=0

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

-u=-105

u=-105/-1

u=+105

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