r-8.4=7.8

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Solution for r-8.4=7.8 equation: 



r-8.4=7.8

We move all terms to the left:

r-8.4-(7.8)=0

We add all the numbers together, and all the variables

r-16.2=0

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

r=16.2

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