-20=4/7u

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Solution for -20=4/7u equation: 



-20=4/7u

We move all terms to the left:

-20-(4/7u)=0



Domain of the equation: 7u)!=0

u!=0/1

u!=0

u∈R



We add all the numbers together, and all the variables

-(+4/7u)-20=0

We get rid of parentheses

-4/7u-20=0

We multiply all the terms by the denominator


-20*7u-4=0

Wy multiply elements

-140u-4=0

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

-140u=4

u=4/-140

u=-1/35

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