document.write( "Question 930824: hi..pls.help me on my home work on mixture problem!......*How many gallons of water is added to 10 gallons of a 40% salt solution to make it a 15% salt solution? \n" ); document.write( "
Algebra.Com's Answer #565313 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
These are all similar:
\n" ); document.write( "============================
\n" ); document.write( "How much decaffeinated coffee(assume to be 0% caffeine)and 40% caffeine coffee should be mixed to produce 20 mugs of 30% caffeine coffee?
\n" ); document.write( "------------
\n" ); document.write( "d = decaf
\n" ); document.write( "c = regular
\n" ); document.write( "----------
\n" ); document.write( "d + c = 20 (total mugs)
\n" ); document.write( "0*d + 40*c = (0 + 40)*30 (total caffeine)
\n" ); document.write( "40c = 1200
\n" ); document.write( "c = 30 mugs
\n" ); document.write( "d = 10 mugs
\n" ); document.write( "
\n" ); document.write( "
\n" );