Question by Lê Quốc Trần Anh - Discuss with MathYouLike

Lê Quốc Trần Anh Coordinator

28/12/2017 at 17:48

At the school store pencils and pens have different prices. Six pencils and four pens cost $4.30. However, four pencils and six pens cost $5.20. What is the cost of five pencils and five pens?

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Lê Anh Duy 28/12/2017 at 22:21

6 pencils and 4 pens cost 4.30

4 pencils and 6 pens cost 5.20

=> 10 pencils and 10 pens cost 4.30 + 5.20 = 9.50

=> 5 pencils and 5 pens cost 9.50 : 2 = 4.25
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Lê Anh Duy 28/12/2017 at 22:33

6 pencils and 4 pens cost 4.30

4 pencils and 6 pens cost 5.20

=> 10 pencils and 10 pens cost 4.30 + 5.20 = 9.50

=> 5 pencils and 5 pens cost 9.50 : 2 = 4.75
Lê Quốc Trần Anh selected this answer.
FA Liên Quân Garena 30/12/2017 at 21:51

6 pencils and 4 pens cost 4.30

4 pencils and 6 pens cost 5.20

=> 10 pencils and 10 pens cost 4.30 + 5.20 = 9.50

=> 5 pencils and 5 pens cost 9.50 : 2 = 4.25

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