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3.2(7.7r-2.7)=48
We move all terms to the left:
3.2(7.7r-2.7)-(48)=0
We multiply parentheses
22.4r-8.64-48=0
We add all the numbers together, and all the variables
22.4r-56.64=0
We move all terms containing r to the left, all other terms to the right
22.4r=56.64
r=56.64/22.4
r=2+1/1.8918918918919
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