document.write( "Question 1076579: 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? \n" ); document.write( "
Algebra.Com's Answer #691196 by stanbon(75887)\"\" \"About 
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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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\n" ); document.write( "Equation::
\n" ); document.write( "zinc + zinc = zinc
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\n" ); document.write( "(1/3)150 + 0*x = 0.10(150+x)
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\n" ); document.write( "50 + 0 = 15 + 0.1x
\n" ); document.write( "35 = 0.1x
\n" ); document.write( "x = 350 lb (amt of copper to add)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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