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A textbook store sold a combined total of
475
physics and math textbooks in a week. The number of math textbooks sold was
61
less than the number of physics textbooks sold. How many textbooks of each type were sold?

Respuesta :

m+p=475
m=p-61
replace m in equation 1 with p-61: p-61+p=475
2p=475+61=536
p=268
m=207

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