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-r-3(1-2r)=3+4r
We move all terms to the left:
-r-3(1-2r)-(3+4r)=0
We add all the numbers together, and all the variables
-r-3(-2r+1)-(4r+3)=0
We add all the numbers together, and all the variables
-1r-3(-2r+1)-(4r+3)=0
We multiply parentheses
-1r+6r-(4r+3)-3=0
We get rid of parentheses
-1r+6r-4r-3-3=0
We add all the numbers together, and all the variables
r-6=0
We move all terms containing r to the left, all other terms to the right
r=6
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