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