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At my office, 16 people own cats, 9 people own dogs, and \(2\) people own both cats and dogs.  How many people own a cat or a dog?

 Jan 20, 2022
 #1
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16 + 9 - 2  =

 Jan 20, 2022
 #2
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So we can subtract 2 from both 16 and 9 to get 14 and 7. Then we add these and get 21. So 21 is the final answer.

 Jan 20, 2022
edited by ImDecentAtMath  Jan 20, 2022

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