How many textbooks of each type were sold

Reference no: EM13203832

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

Reference no: EM13203832

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

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