a textbook sold a combined total of 391 psychology and biology books in a week. the number of biology books sold was 71 less than the number of psychology books. how many text books of each kind was sold.

asked Sep 9, 2021 218k views

4 votes

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5 votes

Answer:

320

Explanation:

I think you have to subtract the number and I think it will be 320

Phenex answered Sep 14, 2021

6.8k points

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