document.write( "Question 284774: How much water must a landscaper add to a 10% solution of selective herbicide to create 5 gallons of 4% solution? How much of the 10% solution did the landsccaper have before he added the water? \n" ); document.write( "
Algebra.Com's Answer #206608 by richwmiller(17219)\"\" \"About 
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We can work this from the view of the herbicide or from the view of the water.
\n" ); document.write( ".10h=5*.04
\n" ); document.write( ".10h=.20
\n" ); document.write( "h=2
\n" ); document.write( "start with 2 gallons of herbicide and add 3 gallons of water.
\n" ); document.write( "THe question \"How much of the 10% solution did the landscaper have before he added the water?\" is poorly worded.
\n" ); document.write( "We don't know maybe he had just 2 gallons maybe he had a warehouse of it.
\n" ); document.write( "But he only used 2 gallons of the 10% herbicide.\r
\n" ); document.write( "\n" ); document.write( "from the view of the water
\n" ); document.write( ".90h+(5-h)=.96*5
\n" ); document.write( ".9h+5-h=4.8\r
\n" ); document.write( "\n" ); document.write( ".9h-h=-.2
\n" ); document.write( "-.1h=-.2
\n" ); document.write( "h=2 gallons of herbicide
\n" ); document.write( "water=5-2=3 so 3 gallons of water\r
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