Equations test OG

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isisalaska: Community Manager; Posts: 363; Joined: Sun Dec 10, 2006 12:24 pmFollowed by: 3 members; Location: St. Louis; Thanked: 7 times

by isisalaska » Sun Jan 07, 2007 4:39 pm

The total price of a basic computer and its printer was $2,500. If the same printer had been purchased with an enhaced computer whose price was $500 more than the price of the basic computer, then the price of the printer would have been 1/5 of the total. How much was the BASIC computer?
Anser: 1,900 Why? How?

Isis Alaska

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Source: Beat The GMAT — Problem Solving | Sun Jan 07, 2007 4:39 pm

thankont: Senior | Next Rank: 100 Posts; Posts: 41; Joined: Fri Dec 15, 2006 9:23 amFollowed by: 1 member; Location: Greece

by thankont » Mon Jan 08, 2007 12:30 am

c+p=2500 (1)
(c+500) = 4T/5 and p = T/5
and (c+500)/p = 4 =>p=(c+500)/4
put in (1) and: 5c+500=10000 =>c=9500/5 = 1900

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