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(5.2*2)+2.75r=11.7
We move all terms to the left:
(5.2*2)+2.75r-(11.7)=0
We add all the numbers together, and all the variables
2.75r+(10.4)-(11.7)=0
We add all the numbers together, and all the variables
2.75r-1.3=0
We move all terms containing r to the left, all other terms to the right
2.75r=1.3
r=1.3/2.75
r=1/2.1153846153846
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