12=r*(0.5)

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Solution for 12=r*(0.5) equation: 



12=r(0.5)

We move all terms to the left:

12-(r(0.5))=0



We calculate terms in parentheses: -(r(0.5)), so:

r(0.5)

We multiply parentheses

0.5r

Back to the equation:

-(0.5r)



We add all the numbers together, and all the variables

-(+0.5r)+12=0

We get rid of parentheses

-0.5r+12=0

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

-0.5r=-12

r=-12/-0.5

r=+24

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