Question 1055858: 15 postcards, 10 envelopes, and a notepad cost 1 dollar and 68 cents. The envelope is 8 times cheaper than the notepad and 2 cents more expensive than the postcard. What is the price of the postcard, the envelope, and the notepad?
Answer by ikleyn(52802)   (Show Source):
You can put this solution on YOUR website! .
15 postcards, 10 envelopes, and a notepad cost 1 dollar and 68 cents. The envelope is 8 times cheaper than the notepad
and 2 cents more expensive than the postcard. What is the price of the postcard, the envelope, and the notepad?
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Let x = postcard.
Then envelope = x+2
notepad = 8*(x+2)
x + (x+2) + 8*(x+2) = 168.
10x + 18 = 168 ---> 10x = 150 ---> x = 15.
Answer. Postcard = 15 cents, envelope = 17 cents, notepad = 8*17 cents = $1.36.
Lesson to learn from this solution: this problem is for ONE unknown.
Not for three.
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