It is: 2c+8
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6c-4c =2c
4c2 + 5c + 2c = 4c2 + 7c = c(4c + 7)
6c-18=4c Why can rearrange this and simplify to 2c=18, which means that c = 9
4c+1-5+2c = 6c-4.
8c + 5 = 4c - 11Subtract 4c from each side:4c + 5 = -11Subtract 5 from each side:4c = -16Divide each side by 4:c = -4