<PRE><B>Question 224049</B>
A 20-ounce alloy of platinum costs $220 per ounce is mixed with an alloy that costs $400 per ounce. How many ounces of the $400 alloy should be used to make an alloy that costs $300 per ounce?
---------------------------------------
Equation:
value + value = value
220*20 + 400x = 300(20+x)
220*20 + 400x = 300*20 + 300x
100x = 80*20
x = 16 ounces (amt. of $400 alloy needed for the mixture)
============================================================
Cheers,
Stan H.</PRE>