21=x/4

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Solution for 21=x/4 equation: 



21=x/4

We move all terms to the left:

21-(x/4)=0

We add all the numbers together, and all the variables

-(+x/4)+21=0

We get rid of parentheses

-x/4+21=0

We multiply all the terms by the denominator


-x+21*4=0

We add all the numbers together, and all the variables

-1x+84=0

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

-x=-84

x=-84/-1

x=+84

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