r-3.1=9.4

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Solution for r-3.1=9.4 equation: 



r-3.1=9.4

We move all terms to the left:

r-3.1-(9.4)=0

We add all the numbers together, and all the variables

r-12.5=0

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

r=12.5

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