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2c-(-1)=9
We move all terms to the left:
2c-(-1)-(9)=0
determiningTheFunctionDomain 2c-9-(-1)=0
We add all the numbers together, and all the variables
2c-8=0
We move all terms containing c to the left, all other terms to the right
2c=8
c=8/2
c=4
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