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-93=-6r-5(1+r)
We move all terms to the left:
-93-(-6r-5(1+r))=0
We add all the numbers together, and all the variables
-(-6r-5(r+1))-93=0
We calculate terms in parentheses: -(-6r-5(r+1)), so:We get rid of parentheses
-6r-5(r+1)
We multiply parentheses
-6r-5r-5
We add all the numbers together, and all the variables
-11r-5
Back to the equation:
-(-11r-5)
11r+5-93=0
We add all the numbers together, and all the variables
11r-88=0
We move all terms containing r to the left, all other terms to the right
11r=88
r=88/11
r=8
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