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-30=6(r-8)
We move all terms to the left:
-30-(6(r-8))=0
We calculate terms in parentheses: -(6(r-8)), so:We get rid of parentheses
6(r-8)
We multiply parentheses
6r-48
Back to the equation:
-(6r-48)
-6r+48-30=0
We add all the numbers together, and all the variables
-6r+18=0
We move all terms containing r to the left, all other terms to the right
-6r=-18
r=-18/-6
r=+3
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