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-(3-7k)+3k=-83
We move all terms to the left:
-(3-7k)+3k-(-83)=0
We add all the numbers together, and all the variables
-(-7k+3)+3k-(-83)=0
We add all the numbers together, and all the variables
3k-(-7k+3)+83=0
We get rid of parentheses
3k+7k-3+83=0
We add all the numbers together, and all the variables
10k+80=0
We move all terms containing k to the left, all other terms to the right
10k=-80
k=-80/10
k=-8
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