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3(c-7)+8=-7
We move all terms to the left:
3(c-7)+8-(-7)=0
We add all the numbers together, and all the variables
3(c-7)+15=0
We multiply parentheses
3c-21+15=0
We add all the numbers together, and all the variables
3c-6=0
We move all terms containing c to the left, all other terms to the right
3c=6
c=6/3
c=2
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