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-80=-11c+-9
We move all terms to the left:
-80-(-11c+-9)=0
We add all the numbers together, and all the variables
-(-11c-9)-80=0
We get rid of parentheses
11c+9-80=0
We add all the numbers together, and all the variables
11c-71=0
We move all terms containing c to the left, all other terms to the right
11c=71
c=71/11
c=6+5/11
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