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-7(4r+5)=-9-2r
We move all terms to the left:
-7(4r+5)-(-9-2r)=0
We add all the numbers together, and all the variables
-7(4r+5)-(-2r-9)=0
We multiply parentheses
-28r-(-2r-9)-35=0
We get rid of parentheses
-28r+2r+9-35=0
We add all the numbers together, and all the variables
-26r-26=0
We move all terms containing r to the left, all other terms to the right
-26r=26
r=26/-26
r=-1
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