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QUESTION
A textbook store sold a combined total of 309 sociology and history textbooks in a week. The number of sociology textbooks sold was two times the number of history textbooks sold. How many textbooks o
A textbook store sold a combined total of 309 sociology and history textbooks in a week. The number of sociology textbooks sold was two times the number of history textbooks sold. How many textbooks of each type were sold?
