4=u/20-2

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Solution for 4=u/20-2 equation: 



4=u/20-2

We move all terms to the left:

4-(u/20-2)=0

We get rid of parentheses

-u/20+2+4=0

We multiply all the terms by the denominator


-u+2*20+4*20=0

We add all the numbers together, and all the variables

-1u+120=0

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

-u=-120

u=-120/-1

u=+120

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