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-4(r+6)=-74
We move all terms to the left:
-4(r+6)-(-74)=0
We add all the numbers together, and all the variables
-4(r+6)+74=0
We multiply parentheses
-4r-24+74=0
We add all the numbers together, and all the variables
-4r+50=0
We move all terms containing r to the left, all other terms to the right
-4r=-50
r=-50/-4
r=12+1/2
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