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65=-9c+7
We move all terms to the left:
65-(-9c+7)=0
We get rid of parentheses
9c-7+65=0
We add all the numbers together, and all the variables
9c+58=0
We move all terms containing c to the left, all other terms to the right
9c=-58
c=-58/9
c=-6+4/9
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