SOLUTION: a merchant has coffee worth $2 a pound that she wishes to mix with 9 pounds of coffee worth $8 a pound to get a mixture that can be sold for $4 a pound. how many pounds of the $2 c
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Question 932455: a merchant has coffee worth $2 a pound that she wishes to mix with 9 pounds of coffee worth $8 a pound to get a mixture that can be sold for $4 a pound. how many pounds of the $2 coffee should be used? Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website! --- price ---------------- Amount
Coffee I 8 ---------------- 9 lbs
Coffee 2 2 ---------------- x lbs
Mixture 4 ---------------- 9 + x lbs
8 * 9 + 2 x = 4 ( 9 + x )
72 + 2 x = 36 + 4 x
2 x -4 x = -72 + 36
-2 x = -36
/ -2
x = 18 lbs Coffee 2
