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-2k-13+13=7k-12+13
We move all terms to the left:
-2k-13+13-(7k-12+13)=0
We add all the numbers together, and all the variables
-2k-(7k+1)-13+13=0
We add all the numbers together, and all the variables
-2k-(7k+1)=0
We get rid of parentheses
-2k-7k-1=0
We add all the numbers together, and all the variables
-9k-1=0
We move all terms containing k to the left, all other terms to the right
-9k=1
k=1/-9
k=-1/9
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