2.1=r-7.5

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Solution for 2.1=r-7.5 equation: 



2.1=r-7.5

We move all terms to the left:

2.1-(r-7.5)=0

We get rid of parentheses

-r+7.5+2.1=0

We add all the numbers together, and all the variables

-1r+9.6=0

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

-r=-9.6

r=-9.6/-1

r=9+0.6/1

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