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# Fox jeans regularly sell for \$15 a pair, and Pony jeans

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Fox jeans regularly sell for \$15 a pair, and Pony jeans [#permalink]  06 Apr 2008, 18:08
Fox jeans regularly sell for \$15 a pair, and Pony jeans regularly sell for \$18 a pair. During a sale these regular unt prices are discounted at different rates so that a total of \$9 is saved by purchasing 5 pairs of jeans: 3 pairs of Fox and 2 pairs of Pony. If the sum of the two discount rates is 22%, what is the discount rate on Pony jeans?

How would I solve this?
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Re: Word Problem... setting up equations? [#permalink]  06 Apr 2008, 18:37
Liquid wrote:
Fox jeans regularly sell for \$15 a pair, and Pony jeans regularly sell for \$18 a pair. During a sale these regular unt prices are discounted at different rates so that a total of \$9 is saved by purchasing 5 pairs of jeans: 3 pairs of Fox and 2 pairs of Pony. If the sum of the two discount rates is 22%, what is the discount rate on Pony jeans?

How would I solve this?

10%
F = Fox discount%
P = Pony discount%
We want to find P=?
Two equations can be found:
1. (F/100)*15*3 + (P/100)*18*2 = 9
2. F + P = 22

First equation can be reduced to:
9F/20 + 9P/25 = 9
=> F/20 + P/25 = 1
=> 5F + 4P = 100
Subtract from equation 2, which is 5F + 5P = 110
P = 10
Re: Word Problem... setting up equations?   [#permalink] 06 Apr 2008, 18:37
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