SOLUTION: Translate the following into a system of equations, then solve it: A customer walks into an electronics store and buys five MP3 players and eight sets of headphones, paying $840.
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Question 163292: Translate the following into a system of equations, then solve it: A customer walks into an electronics store and buys five MP3 players and eight sets of headphones, paying $840. A second customer buys three MP3 players and four sets of headphones, and pays $480. How much does an MP3 player cost? How much does a set of headphones cost?
Answer by jojo14344(1513) (Show Source): You can put this solution on YOUR website!
1st customer:
----------------------> eqn 1
In eqn 1 we get,
-------------------> eqn 2
2nd customer:
----------------------> eqn 3
Subst. eqn 2 in eqn 3:
, get LCD
, cross multiply
, cost of a MP3
Via eqn 2:
, cost of Headphone set
In doubt? GO back eqn 3:
Go back eqn 1:
Thank you,
Jojo
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