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144/k=9

I don't understand how to do this using reciprocals, how my teacher wants me to solve the problem.
Note: The fraction bar is in my paper, so it's 144 being the numerator, k being the denominator, and then =9 if that makes any sense.

Multiply both sides of the equation by k.

144 = 9k
16 = k

thank you so much!

You're very welcome.

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