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5(r+9)-2(1-r)=-4
We move all terms to the left:
5(r+9)-2(1-r)-(-4)=0
We add all the numbers together, and all the variables
5(r+9)-2(-1r+1)-(-4)=0
We add all the numbers together, and all the variables
5(r+9)-2(-1r+1)+4=0
We multiply parentheses
5r+2r+45-2+4=0
We add all the numbers together, and all the variables
7r+47=0
We move all terms containing r to the left, all other terms to the right
7r=-47
r=-47/7
r=-6+5/7
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