12.8=0.8r

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Solution for 12.8=0.8r equation: 



12.8=0.8r

We move all terms to the left:

12.8-(0.8r)=0

We add all the numbers together, and all the variables

-(+0.8r)+12.8=0

We get rid of parentheses

-0.8r+12.8=0

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

-0.8r=-12.8

r=-12.8/-0.8

r=+16

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