document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1110017>Question 1110017</A>: <I><SPAN STYLE=\"word-break: break-all;\"> By mass, one alloy consists of 60% copper and 40% ziinc.  Another is 30% copper and 70% zinc.  How many grams of each alloy are needed to make 120g of an alloy that consists of 50% of each metal? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #725020 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=725020\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> By mass, one alloy consists of 60% copper and 40% zinc. Another is 30% copper and 70% zinc. How many grams of each alloy are needed to make 120g of an alloy that consists of 50% of each metal?<BR>\n" );
document.write( "--------<BR>\n" );
document.write( "Copper Eq:: 0.6x + 0.3y = 0.5*120<BR>\n" );
document.write( "Zinc Eq:: 0.4x + 0.7y = 0.5*120<BR>\n" );
document.write( "----------------------<BR>\n" );
document.write( "6x + 3y = 5*120<BR>\n" );
document.write( "4x + 7y = 5*120<BR>\n" );
document.write( "------<BR>\n" );
document.write( "24x + 12y = 20*120<BR>\n" );
document.write( "24x + 42y = 30*120<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "30y = 1200<BR>\n" );
document.write( "y = 40 grams (wt. of alloy with 30% copper)<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x = 120-40 = 80 grams (wt of alloy with 60% copper)<BR>\n" );
document.write( "----------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "-----------  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );