14-01-2019
Mathematics

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john spends $112 total. He buys 11 items total. Staplers are $7 and 3 hole punches are $12. how many of each did he purchase?

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14-01-2019

Let x=staplers and y=hole punches.

We have:

x+y=11

7x+12y=112

7x+7y=77

5y=35

y=7

x+7=11

x=4

Therefore, he bought 4 staplers and 7 hole punches.

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