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(r+2)(3.6)=6r
We move all terms to the left:
(r+2)(3.6)-(6r)=0
We add all the numbers together, and all the variables
-6r+(r+2)(3.6)=0
We multiply parentheses ..
-6r+(+3.6r+7.2)=0
We add all the numbers together, and all the variables
-6r+(3.6r+7.2)=0
We get rid of parentheses
-6r+3.6r+7.2=0
We add all the numbers together, and all the variables
-2.4r+7.2=0
We move all terms containing r to the left, all other terms to the right
-2.4r=-7.2
r=-7.2/-2.4
r=3+8.8817841970013E-16/2.4
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