SOLUTION: A store owner has 12 pounds of pasta worth 70 cents a pound. She wants to mix it with pasta worth 45 cents a pound so that the total mixture can be sold for 55 cents a pound (witho

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Question 375859: A store owner has 12 pounds of pasta worth 70 cents a pound. She wants to mix it with pasta worth 45 cents a pound so that the total mixture can be sold for 55 cents a pound (without any gain or loss). How much of the 45 cent pasta must she use?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let A be the amount of 45 cents/lb pasta.
45A%2B70%2812%29=55%28A%2B12%29
45A%2B840=55A%2B660
10A=180
highlight%28A=18%29 lbs.