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56=8(r+4)
We move all terms to the left:
56-(8(r+4))=0
We calculate terms in parentheses: -(8(r+4)), so:We get rid of parentheses
8(r+4)
We multiply parentheses
8r+32
Back to the equation:
-(8r+32)
-8r-32+56=0
We add all the numbers together, and all the variables
-8r+24=0
We move all terms containing r to the left, all other terms to the right
-8r=-24
r=-24/-8
r=+3
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