A store sells small notebooks for $6 and large notebooks for $12. If a student buys 6 notebooks and spends $54, how many of each size did he buy?

Question

Mathematics

Jeremiah Peters

4 November, 04:45

A store sells small notebooks for $6 and large notebooks for $12. If a student buys 6 notebooks and spends $54, how many of each size did he buy?

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Answers (1)

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Britney Morrison · Answer 1

small = x

large = y

x+y = 6

x=6-y

6x + 12y = 54

6 (6-y) + 12y = 54

36-6y + 12y = 54

6y = 18

y = 18/6 = 3

they bought 3 small and 3 large

check 3*6 = 18

3*12 = 36

36+18 = 54