document.write( "Question 422563: How many gallons of 50% solution must be mixed with 100 Gallons of 20% solution of salt that is 40% salt \n" ); document.write( "
Algebra.Com's Answer #319580 by jorel1380(3719)\"\" \"About 
You can put this solution on YOUR website!
m(.5)+100(.2)=(m+100).4
\n" ); document.write( ".5m+20=.4m+40
\n" ); document.write( ".1m=20
\n" ); document.write( "m=20/.1=200
\n" ); document.write( "You need 200 gallons of 50% solution for your mix..
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