12=r/2+8

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Solution for 12=r/2+8 equation: 



12=r/2+8

We move all terms to the left:

12-(r/2+8)=0

We get rid of parentheses

-r/2-8+12=0

We multiply all the terms by the denominator


-r-8*2+12*2=0

We add all the numbers together, and all the variables

-1r+8=0

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

-r=-8

r=-8/-1

r=+8

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