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5(r+1)-4r=-5+8
We move all terms to the left:
5(r+1)-4r-(-5+8)=0
We add all the numbers together, and all the variables
5(r+1)-4r-3=0
We add all the numbers together, and all the variables
-4r+5(r+1)-3=0
We multiply parentheses
-4r+5r+5-3=0
We add all the numbers together, and all the variables
r+2=0
We move all terms containing r to the left, all other terms to the right
r=-2
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