Amy is in France buying truffles, which she will import to the US. At one quaint farm she buys *x* truffles at 3 for 10 euros, and at the next quaint farm she buys 2*x* truffles at 5 for 21 euros. What is the price per dozen at which she would need to sell the truffles she has bought so far in order to break even?

Amy bought

*x*truffles at € 10/3 each, and 2*x*at € 21/5 each. So she has*x*+ 2*x*= 3x truffles, and she has spent:We note that 3

*x*truffles is*x*/4 dozen.To find the break-even price per dozen, we divide the total cost by the number of dozens:

Amy should sell the truffles at 47 euros per dozen or 4 euros apiece.