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92.768=20.8(2c-1)
We move all terms to the left:
92.768-(20.8(2c-1))=0
We calculate terms in parentheses: -(20.8(2c-1)), so:We get rid of parentheses
20.8(2c-1)
We multiply parentheses
41.6c-20.8
Back to the equation:
-(41.6c-20.8)
-41.6c+20.8+92.768=0
We add all the numbers together, and all the variables
-41.6c+113.568=0
We move all terms containing c to the left, all other terms to the right
-41.6c=-113.568
c=-113.568/-41.6
c=2+22.198830409357/30.409356725146
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