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3+7k=-13k+3+20k
We move all terms to the left:
3+7k-(-13k+3+20k)=0
We add all the numbers together, and all the variables
7k-(7k+3)+3=0
We get rid of parentheses
7k-7k-3+3=0
We add all the numbers together, and all the variables
=0
k=0/1
k=0
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