SOLUTION: A 20 gram alloy of platinum that costs P220 per gram is mixed with an alloy that costs P400 per gram. How many grams of the P400 alloy should be used to make an alloy that costs P3

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Question 1012017: A 20 gram alloy of platinum that costs P220 per gram is mixed with an alloy that costs P400 per gram. How many grams of the P400 alloy should be used to make an alloy that costs P300 per gram?
Answer by stanbon(75887) About Me  (Show Source):
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A 20 gram alloy of platinum that costs P220 per gram is mixed with an alloy that costs P400 per gram. How many grams of the P400 alloy should be used to make an alloy that costs P300 per gram?
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Equation:
value + value = value
220*20 + 400x = 300(20+x)
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220*20 + 400x = 300*20 + 300x
100x = 80*20
x = 16 grams (amt of P400 alloy needed)
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Cheers,
Stan H.
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