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4.9(8r-3.4)=8
We move all terms to the left:
4.9(8r-3.4)-(8)=0
We multiply parentheses
39.2r-16.66-8=0
We add all the numbers together, and all the variables
39.2r-24.66=0
We move all terms containing r to the left, all other terms to the right
39.2r=24.66
r=24.66/39.2
r=6.73770491803/10.7103825137
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