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-5(r+3)=-72
We move all terms to the left:
-5(r+3)-(-72)=0
We add all the numbers together, and all the variables
-5(r+3)+72=0
We multiply parentheses
-5r-15+72=0
We add all the numbers together, and all the variables
-5r+57=0
We move all terms containing r to the left, all other terms to the right
-5r=-57
r=-57/-5
r=11+2/5
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