<PRE><B>Question 1076579</B>
In an alloy of 150 pounds of zinc and copper, there are 100 pounds of copper. How much copper must be added so that the alloy may be 10% zinc?
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Equation::
zinc + zinc = zinc
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(1/3)150 + 0*x = 0.10(150+x)
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50 + 0 = 15 + 0.1x
35 = 0.1x
x = 350 lb (amt of copper to add)
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Cheers,
Stan H.
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