7.5=r-8.1

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Solution for 7.5=r-8.1 equation: 



7.5=r-8.1

We move all terms to the left:

7.5-(r-8.1)=0

We get rid of parentheses

-r+8.1+7.5=0

We add all the numbers together, and all the variables

-1r+15.6=0

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

-r=-15.6

r=-15.6/-1

r=15+0.6/1

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