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5.2(2r-1.3)=56.5
We move all terms to the left:
5.2(2r-1.3)-(56.5)=0
We add all the numbers together, and all the variables
5.2(2r-1.3)-56.5=0
We multiply parentheses
10.4r-6.76-56.5=0
We add all the numbers together, and all the variables
10.4r-63.26=0
We move all terms containing r to the left, all other terms to the right
10.4r=63.26
r=63.26/10.4
r=6+0.86/10.4
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