SOLUTION: I need help with this word problem please. A merchant has coffee worth $40 a pound that she wishes to mix with 30 pounds of coffee worth $90 a pound to get a mixture that can be

Question 602868: I need help with this word problem please.
A merchant has coffee worth $40 a pound that she wishes to mix with 30 pounds of coffee worth $90 a pound to get a mixture that can be sold for $60 a pound. How many pounds of the $40 coffee should be used?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = pounds of $40/pound coffee needed
= cost of $40/pound coffee
= cost of $90/pound coffee
---------------

45 pounds of $40/pound coffee is needed
check:

OK
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