7/1.4=20/x

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Solution for 7/1.4=20/x equation: 



7/1.4=20/x

We move all terms to the left:

7/1.4-(20/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

-(+20/x)+7/1.4=0

We add all the numbers together, and all the variables

-(+20/x)+5=0

We get rid of parentheses

-20/x+5=0

We multiply all the terms by the denominator


5*x-20=0

We add all the numbers together, and all the variables

5x-20=0

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

5x=20

x=20/5

x=4

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