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VikaD [51]
3 years ago
7

Jon buys staplers and three hole punches. He spends $112 on them in total. Each stapler is $7 and each three hole punch is $12.

If he buys 11 items in all how many staplers and three hole punches did he purchase ?
Mathematics
1 answer:
stiv31 [10]3 years ago
8 0

Answer: Jon purchased 4 staplers and 7 three hole punchers.


Step-by-step explanation:

Let x be the number of staplers and y be the number of three hole punches purchased by Jon.

Then the equation for total items will be

x+y=11............(1)

And the equation for the total cost will be

7x+12y=112........................(2)

Multiply eq(1) by 7 and then subtract from eq (2), we get

7x+12y-(7x+7y)=112-7(11)\\\Rightarrow5y=112-77\\\Rightarrow\ 5=35\\\Rightarrow\ y=7

Put y=7 in eq(1), we get x= 4.

Hence, Jon purchased 4 staplers and 7 three hole punchers.


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