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4r-r=-6-2
We move all terms to the left:
4r-r-(-6-2)=0
We add all the numbers together, and all the variables
4r-r-(-8)=0
We add all the numbers together, and all the variables
3r+8=0
We move all terms containing r to the left, all other terms to the right
3r=-8
r=-8/3
r=-2+2/3
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