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Anyone know how to do this using algebra?

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Anyone know how to do this using algebra?

by Oracio » Sat Jun 16, 2007 11:22 am
This problem is off page 344 of the KAPLAN GMAT comprehensive Program 2007.

The book suggests that i use back solving, but i am curious as to who i could solve this problem using algebra.

An insurance company provides coverage for a certain dental procedure according to the following rules: the policy pays 80% of the first $1200, and 50% of the cost above $1200. If a patient had to pay $490 of the cost for this procedure himself, how much did the procedure cost:

A $1200
B $1300
C $1500
D $1600
E $1700
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by f2001290 » Sat Jun 16, 2007 12:42 pm
(20/100)1200 + (50/100) X = 490

X = 500

Total Cost = 1200 + 500 = 1700
Hence E

What's the OA
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by Oracio » Sat Jun 16, 2007 1:18 pm
you got it right. hm, looks like i was on the right track. i just failed to add the 500 to 1200. thanks!
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