document.write( "Question 248881: Mixture problem: how many liters of 10% solution and how many liters of 20% solution must be mixed to obtain 20 liters of a 17.5% solution? show equations and solve \n" ); document.write( "
Algebra.Com's Answer #181375 by nerdybill(7384)\"\" \"About 
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Mixture problem: how many liters of 10% solution and how many liters of 20% solution must be mixed to obtain 20 liters of a 17.5% solution? show equations and solve
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\n" ); document.write( "Let x = liters of 10% solution
\n" ); document.write( "then
\n" ); document.write( "20-x = liters of 20% solution
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\n" ); document.write( ".10x + .20(20-x) = .175(20)
\n" ); document.write( ".10x + 4 - .20x = 3.5
\n" ); document.write( "4 - .10x = 3.5
\n" ); document.write( "-.10x = -.5
\n" ); document.write( "x = -.5/-.10
\n" ); document.write( "x = 5 liters (10% solution)
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\n" ); document.write( "20% solution:
\n" ); document.write( "20-x = 20-5 = 15 liters
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