document.write( "Question 486301: A metallurgist needs to make 3 oz. of an alloy containing 76% platinum. She is going to melt and combine one metal that is 90% platinum with another metal that is 70% platinum. How much of each should she use? \n" ); document.write( "
Algebra.Com's Answer #332423 by mananth(16946)\"\" \"About 
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percent percentage ---------------- quantity
\n" ); document.write( "Metal I 90 ---------------- x Oz
\n" ); document.write( "Metal II 70 ---------------- 3 - x Oz
\n" ); document.write( "Mixture 76.00% ---------------- 3
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\n" ); document.write( "90x+70( 3-x) = 76 * 3
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\n" ); document.write( "90x+210 - 70 x = 228
\n" ); document.write( "90 x - 70 x= 228 - 210
\n" ); document.write( "20 x = 18
\n" ); document.write( "/ 20
\n" ); document.write( " x = 0.9Oz 90.00% Metal I
\n" ); document.write( "2.1 Oz 70.00% Metal II
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