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66=6(r-73)
We move all terms to the left:
66-(6(r-73))=0
We calculate terms in parentheses: -(6(r-73)), so:We get rid of parentheses
6(r-73)
We multiply parentheses
6r-438
Back to the equation:
-(6r-438)
-6r+438+66=0
We add all the numbers together, and all the variables
-6r+504=0
We move all terms containing r to the left, all other terms to the right
-6r=-504
r=-504/-6
r=+84
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