7=r/2-4

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Solution for 7=r/2-4 equation: 



7=r/2-4

We move all terms to the left:

7-(r/2-4)=0

We get rid of parentheses

-r/2+4+7=0

We multiply all the terms by the denominator


-r+4*2+7*2=0

We add all the numbers together, and all the variables

-1r+22=0

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

-r=-22

r=-22/-1

r=+22

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