21=x/2+7

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Solution for 21=x/2+7 equation: 



21=x/2+7

We move all terms to the left:

21-(x/2+7)=0

We get rid of parentheses

-x/2-7+21=0

We multiply all the terms by the denominator


-x-7*2+21*2=0

We add all the numbers together, and all the variables

-1x+28=0

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

-x=-28

x=-28/-1

x=+28

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