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2.5(9.6r-7.1)=68.4
We move all terms to the left:
2.5(9.6r-7.1)-(68.4)=0
We add all the numbers together, and all the variables
2.5(9.6r-7.1)-68.4=0
We multiply parentheses
22.5r-17.75-68.4=0
We add all the numbers together, and all the variables
22.5r-86.15=0
We move all terms containing r to the left, all other terms to the right
22.5r=86.15
r=86.15/22.5
r=3+7.03773584906/8.49056603774
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