r+6.9=9.9

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Solution for r+6.9=9.9 equation: 



r+6.9=9.9

We move all terms to the left:

r+6.9-(9.9)=0

We add all the numbers together, and all the variables

r-3=0

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

r=3

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