document.write( "Question 1033185: Sandy needs 14 lb of metal with 50 % silver. If Sandy combines one metal with 16 % silver, and another with 78 % silver, how much of each metal does Sandy need? \n" ); document.write( "
Algebra.Com's Answer #647770 by fractalier(6550)\"\" \"About 
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Call the number of pounds of 16% used, x.
\n" ); document.write( "Then the number of pounds of 78% used must be 14-x.
\n" ); document.write( "The setup looks like this:
\n" ); document.write( ".16x + .78(14-x) = .50(14)
\n" ); document.write( "Now solve for x...
\n" ); document.write( ".16x + 10.92 - .78x = 7
\n" ); document.write( "-.62x = -3.92
\n" ); document.write( "x = 6.32 lb of 16%
\n" ); document.write( "which means Sandy needs
\n" ); document.write( "14-x = 7.68 lb of 78% silver
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