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6.5=r/3
We move all terms to the left:
6.5-(r/3)=0
We add all the numbers together, and all the variables
-(+r/3)+6.5=0
We get rid of parentheses
-r/3+6.5=0
We multiply all the terms by the denominator
-r+(6.5)*3=0
We add all the numbers together, and all the variables
-1r+19.5=0
We move all terms containing r to the left, all other terms to the right
-r=-19.5
r=-19.5/-1
r=19+0.5/1
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