21=x/4-7

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Solution for 21=x/4-7 equation: 



21=x/4-7

We move all terms to the left:

21-(x/4-7)=0

We get rid of parentheses

-x/4+7+21=0

We multiply all the terms by the denominator


-x+7*4+21*4=0

We add all the numbers together, and all the variables

-1x+112=0

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

-x=-112

x=-112/-1

x=+112

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