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-8c+1=-7-6c
We move all terms to the left:
-8c+1-(-7-6c)=0
We add all the numbers together, and all the variables
-8c-(-6c-7)+1=0
We get rid of parentheses
-8c+6c+7+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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