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12-09-2017
Mathematics

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A store sells small notebooks for $8 and large notebooks for $16 . If a student buys 6 notebooks and spends $72 , how many of each size did he buy?

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Ripsidus Ripsidus

12-09-2017

8x+16y=72
x+y=6

x=6-y
8*(6-y)+16y=72
8y+48=72
8y=24
y=3
x=6-3=3
Answer: 3 of each size

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