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