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r+4r=-6-r
We move all terms to the left:
r+4r-(-6-r)=0
We add all the numbers together, and all the variables
r+4r-(-1r-6)=0
We add all the numbers together, and all the variables
5r-(-1r-6)=0
We get rid of parentheses
5r+1r+6=0
We add all the numbers together, and all the variables
6r+6=0
We move all terms containing r to the left, all other terms to the right
6r=-6
r=-6/6
r=-1
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