document.write( "Question 393122: please help me solve this problem:\r
\n" ); document.write( "\n" ); document.write( "1. A farmer has 100 galoons of 70% pure disinfectant. he wishes to mix it with disinfectant which is 90% pure in order to obtain 75% pure disinfectant. how much of the 90% pure disinfectant must he use?
\n" ); document.write( "please show the solution, thank you!! \n" ); document.write( "

Algebra.Com's Answer #279065 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!


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document.write( "Hi
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document.write( "Let x represent  the total amount of the 90% solution
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document.write( "Question states***
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document.write( "Mixing to form (100+x) gallons of 75%
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document.write( " .70*100gal + .90x = .75(100gal+x)
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document.write( "solving for x
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document.write( "          .15x = .05*100gal
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document.write( "             x = .05*100gal/.15
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document.write( "             x = 33 1/3 gal
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