-20=4/5u

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Solution for -20=4/5u equation: 



-20=4/5u

We move all terms to the left:

-20-(4/5u)=0



Domain of the equation: 5u)!=0

u!=0/1

u!=0

u∈R



We add all the numbers together, and all the variables

-(+4/5u)-20=0

We get rid of parentheses

-4/5u-20=0

We multiply all the terms by the denominator


-20*5u-4=0

Wy multiply elements

-100u-4=0

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

-100u=4

u=4/-100

u=-1/25

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