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A textbook store sold a combined total of 207 psychology and biology textbooks in a week. The number of biology textbooks sold was 59 less than the number of psychology textbooks sold. How many textbooks
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Aug 20, 2019
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A textbook store sold a combined total of 207 psychology and biology textbooks in a week. The number of biology textbooks sold was 59 less than the number of psychology textbooks sold. How many textbooks of each type were sold?
Mathematics
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Bkis
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p+ b= 207
p-59= b
P+ (P-59)=207
2p-59=207:
2p =207+59
p=266/2
P=133
b=133-59
b=74
psych books= 133
biology books= 74
74+133= 207(Check)
Clyde Barrow
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Aug 26, 2019
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Clyde Barrow
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