40/2=80/x

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Solution for 40/2=80/x equation: 



40/2=80/x

We move all terms to the left:

40/2-(80/x)=0



Domain of the equation: x)!=0

x!=0/1

x!=0

x∈R



We add all the numbers together, and all the variables

-(+80/x)+40/2=0

We add all the numbers together, and all the variables

-(+80/x)+20=0

We get rid of parentheses

-80/x+20=0

We multiply all the terms by the denominator


20*x-80=0

We add all the numbers together, and all the variables

20x-80=0

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

20x=80

x=80/20

x=4

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