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3.3(13.1r-2.2)=61.1
We move all terms to the left:
3.3(13.1r-2.2)-(61.1)=0
We add all the numbers together, and all the variables
3.3(13.1r-2.2)-61.1=0
We multiply parentheses
42.9r-7.26-61.1=0
We add all the numbers together, and all the variables
42.9r-68.36=0
We move all terms containing r to the left, all other terms to the right
42.9r=68.36
r=68.36/42.9
r=1+17.4383561644/29.3835616438
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