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3c+-1=c+9
We move all terms to the left:
3c+-1-(c+9)=0
We add all the numbers together, and all the variables
3c-(c+9)=0
We get rid of parentheses
3c-c-9=0
We add all the numbers together, and all the variables
2c-9=0
We move all terms containing c to the left, all other terms to the right
2c=9
c=9/2
c=4+1/2
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