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56=8(r+5)
We move all terms to the left:
56-(8(r+5))=0
We calculate terms in parentheses: -(8(r+5)), so:We get rid of parentheses
8(r+5)
We multiply parentheses
8r+40
Back to the equation:
-(8r+40)
-8r-40+56=0
We add all the numbers together, and all the variables
-8r+16=0
We move all terms containing r to the left, all other terms to the right
-8r=-16
r=-16/-8
r=+2
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