20=u/2-9

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Solution for 20=u/2-9 equation: 



20=u/2-9

We move all terms to the left:

20-(u/2-9)=0

We get rid of parentheses

-u/2+9+20=0

We multiply all the terms by the denominator


-u+9*2+20*2=0

We add all the numbers together, and all the variables

-1u+58=0

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

-u=-58

u=-58/-1

u=+58

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