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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