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-37=8r-(-27)
We move all terms to the left:
-37-(8r-(-27))=0
We calculate terms in parentheses: -(8r-(-27)), so:We get rid of parentheses
8r-(-27)
We add all the numbers together, and all the variables
8r+27
Back to the equation:
-(8r+27)
-8r-27-37=0
We add all the numbers together, and all the variables
-8r-64=0
We move all terms containing r to the left, all other terms to the right
-8r=64
r=64/-8
r=-8
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