90/x=100/x+20

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Solution for 90/x=100/x+20 equation: 



90/x=100/x+20

We move all terms to the left:

90/x-(100/x+20)=0



Domain of the equation: x!=0

x∈R





Domain of the equation: x+20)!=0

x∈R



We get rid of parentheses

90/x-100/x-20=0

We multiply all the terms by the denominator


-20*x+90-100=0

We add all the numbers together, and all the variables

-20x-10=0

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

-20x=10

x=10/-20

x=-1/2

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