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-17.4=-3(r-11.57)
We move all terms to the left:
-17.4-(-3(r-11.57))=0
We calculate terms in parentheses: -(-3(r-11.57)), so:We get rid of parentheses
-3(r-11.57)
We multiply parentheses
-3r+34.71
Back to the equation:
-(-3r+34.71)
3r-34.71-17.4=0
We add all the numbers together, and all the variables
3r-52.11=0
We move all terms containing r to the left, all other terms to the right
3r=52.11
r=52.11/3
r=17+1/2.7027027027027
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