4.2=x/5

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Solution for 4.2=x/5 equation: 



4.2=x/5

We move all terms to the left:

4.2-(x/5)=0

We add all the numbers together, and all the variables

-(+x/5)+4.2=0

We get rid of parentheses

-x/5+4.2=0

We multiply all the terms by the denominator


-x+(4.2)*5=0

We add all the numbers together, and all the variables

-1x+21=0

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

-x=-21

x=-21/-1

x=+21

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