document.write( "Question 453055: solution A is 40% acid. Solution B is 80% acid. How much of each is needed to make 120 liters of a solution that is 50% acid? \n" ); document.write( "
Algebra.Com's Answer #311511 by robertb(5830)\"\" \"About 
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0.40*x + 0.80*(120 - x) = 0.50*120\r
\n" ); document.write( "\n" ); document.write( "==> 0.4x + 96 - 0.8x = 60\r
\n" ); document.write( "\n" ); document.write( "==> -0.4x = -36\r
\n" ); document.write( "\n" ); document.write( "==> x = 90 liters of 40% acid, and 120 - x = 30 liters 80% acid.\r
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