<PRE><B>Question 868941</B>
how many liters of 30% silver must be added to 80 liters of 50% silver to make an alloy that is 40% silver?
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Equation:
silver + silver = silver
0.30x + 0.50*80 = 0.40(x+80)
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30x + 50*80 = 40x + 40*80
10x = 10*80
x = 80 liters (amt. of 30% alloy to add)
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Cheers,
Stan H.
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