document.write( "Question 613562: You need a 65% alcohol solution. On hand, you have a 525 mL of a 40% alcohol mixture. How much pure alcohol will you need to add to obtain the desired solution?
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Algebra.Com's Answer #386075 by nerdybill(7384)\"\" \"About 
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You need a 65% alcohol solution. On hand, you have a 525 mL of a 40% alcohol mixture. How much pure alcohol will you need to add to obtain the desired solution?
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\n" ); document.write( "Let x = amount (mL) of pure alcohol added
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\n" ); document.write( "x + .40(525) = .65(x+525)
\n" ); document.write( "x + .40(525) = .65(x+525)
\n" ); document.write( "x + 210 = .65x+341.25
\n" ); document.write( ".25x + 210 = 341.25
\n" ); document.write( ".25x = 131.25
\n" ); document.write( "x = 525 mL\r
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