21=u/5-11

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Solution for 21=u/5-11 equation: 



21=u/5-11

We move all terms to the left:

21-(u/5-11)=0

We get rid of parentheses

-u/5+11+21=0

We multiply all the terms by the denominator


-u+11*5+21*5=0

We add all the numbers together, and all the variables

-1u+160=0

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

-u=-160

u=-160/-1

u=+160

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