-20=-5/7u

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Solution for -20=-5/7u equation: 



-20=-5/7u

We move all terms to the left:

-20-(-5/7u)=0



Domain of the equation: 7u)!=0

u!=0/1

u!=0

u∈R



We get rid of parentheses

5/7u-20=0

We multiply all the terms by the denominator


-20*7u+5=0

Wy multiply elements

-140u+5=0

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

-140u=-5

u=-5/-140

u=1/28

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