stephanie spent $79 she bought a skirt, a t-shirt and a pair of shorts. She paid $9 more for the t-shirt than for the shorts, and $7 more for the skirt than for the t-shirt. how much did the skirt cost her?

answer is $34.

stephanie spent $79 she bought a skirt, a t-shirt and a pair of shorts. She paid $9 more for the t-shirt than for the shorts, and $7 more for the skirt than for the t-shirt. how much did the skirt cost her?

answer is $34.

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Irvine, CA

Charlie:

Let the cost of the shorts (least expensive) be x dollars.

The cost for the t-shirt is $(x+9).

The cost for the skirt is $(x+9) + 7 for the skirt.

Her total cost is x + x + 9 + x + 9 + 7 = 3x + 25 dollars. We are given that this total cost is $79

So, equating, we get 3x + 25 = 79, that is 3x = 54. Hence x = 18, the dollar cost of the shorts.

The dollar cost of the skirt is therefore 18 + 9 + 7 = 34.

Dattaprabhakar (Dr. G.)

Carrollton, TX

Let s = value of the skirt, t = value of the t-shirt, and p = value of the pair of pants.

79 = s + t + p

t = 9 + p ⇒ p = t - 9

s = 7 + t

Substitute p and s into the first equation and you should get t = 27. So the skirt costs s = 7 + 27 = 34.

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