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5(r+9)-2(1-=1)
We move all terms to the left:
5(r+9)-2(1--(1))=0
We add all the numbers together, and all the variables
5(r+9)-22=0
We multiply parentheses
5r+45-22=0
We add all the numbers together, and all the variables
5r+23=0
We move all terms containing r to the left, all other terms to the right
5r=-23
r=-23/5
r=-4+3/5
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