document.write( "Question 69721: A chemist has 2 alloys--one containing 20% gold and 25% lead, the other containing 30% gold and 50% lead. How many grams of each is needed to make an alloy containing 60 grams of gold and 90 grams of lead?\r
\n" ); document.write( "\n" ); document.write( "Please solve using 2 variables and 2 equations.\r
\n" ); document.write( "\n" ); document.write( "I tried these 2 equations, but I did not get the correct answers which I believe to be 180 and 80.
\n" ); document.write( "0.2x +0.3y = 60
\n" ); document.write( "0.25x+0.5y = 90
\n" ); document.write( "I may need an equation using \"x+y\" to tie it all together...Please help because this is driving me crazy!!!
\n" ); document.write( "

Algebra.Com's Answer #49667 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
Maybe I'm reading the problem wrong, but I got the same equations as you.
\n" ); document.write( "I ended up with x=120 and y=120
\n" ); document.write( "That gives me
\n" ); document.write( "alloy x
\n" ); document.write( "--------
\n" ); document.write( "24 grams gold
\n" ); document.write( "30 grams lead
\n" ); document.write( "66 grams left over
\n" ); document.write( "and
\n" ); document.write( "alloy y
\n" ); document.write( "--------
\n" ); document.write( "36 grams gold
\n" ); document.write( "60 grams lead
\n" ); document.write( "24 grams left over
\n" ); document.write( "and
\n" ); document.write( "the equations check OK
\n" ); document.write( "24 + 36 = 60
\n" ); document.write( "30 + 60 = 90
\n" ); document.write( "
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