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-8-8=-4(2r+2)
We move all terms to the left:
-8-8-(-4(2r+2))=0
We add all the numbers together, and all the variables
-(-4(2r+2))-16=0
We calculate terms in parentheses: -(-4(2r+2)), so:We get rid of parentheses
-4(2r+2)
We multiply parentheses
-8r-8
Back to the equation:
-(-8r-8)
8r+8-16=0
We add all the numbers together, and all the variables
8r-8=0
We move all terms containing r to the left, all other terms to the right
8r=8
r=8/8
r=1
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