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5.4(2r-7.2)=71.28
We move all terms to the left:
5.4(2r-7.2)-(71.28)=0
We add all the numbers together, and all the variables
5.4(2r-7.2)-71.28=0
We multiply parentheses
10.8r-38.88-71.28=0
We add all the numbers together, and all the variables
10.8r-110.16=0
We move all terms containing r to the left, all other terms to the right
10.8r=110.16
r=110.16/10.8
r=10+1/5
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