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4.3(r+2)=17.2
We move all terms to the left:
4.3(r+2)-(17.2)=0
We add all the numbers together, and all the variables
4.3(r+2)-17.2=0
We multiply parentheses
4.3r+8.6-17.2=0
We add all the numbers together, and all the variables
4.3r-8.6=0
We move all terms containing r to the left, all other terms to the right
4.3r=8.6
r=8.6/4.3
r=2
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