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21 September, 08:43

A textbook store sold a combined total of 465 psychology and physics textbooks in a week. The number of psychology textbooks sold was two times the number of physics textbooks sold. How many textbooks of each type were sold?

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  1. 21 September, 11:59
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    You should make

    465^3=155

    That mean that you should put 155+155=310 for the number of psychology textbook

    And the number of physics textbook is 155
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