3=r/2-7

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Solution for 3=r/2-7 equation: 



3=r/2-7

We move all terms to the left:

3-(r/2-7)=0

We get rid of parentheses

-r/2+7+3=0

We multiply all the terms by the denominator


-r+7*2+3*2=0

We add all the numbers together, and all the variables

-1r+20=0

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

-r=-20

r=-20/-1

r=+20

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