document.write( "Question 365804: Zoe has a solution that is 75% acid and a solution that is 25% acid. How much of each should she use to obtain 400ml of a solution that is 45% acid? \n" ); document.write( "
Algebra.Com's Answer #260727 by robertb(5830)\"\" \"About 
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0.75x + 0.25(400-x) = 0.45*400,
\n" ); document.write( "0.75x + 100-0.25x = 180,
\n" ); document.write( "0.50x = 80,
\n" ); document.write( "x = 160 ml of the 75% acid solution, and
\n" ); document.write( "400 - x = 240 ml of the 25% acid solution.
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