document.write( "Question 265505: A solution containing 30% insecticide is to be mixed with a solution containing 50% insecticide to make 200 L of a solution containing 42% insecticide. How much of the 50% insecticide solution should be used? \n" ); document.write( "
Algebra.Com's Answer #195212 by CharlesG2(834)\"\" \"About 
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A solution containing 30% insecticide is to be mixed with a solution containing 50% insecticide to make 200 L of a solution containing 42% insecticide. How much of the 50% insecticide solution should be used?\r
\n" ); document.write( "\n" ); document.write( "0.30(200 - x) + 0.50x = 0.42*200
\n" ); document.write( "60 - 0.30x + 0.50x = 84
\n" ); document.write( "0.20x = 24
\n" ); document.write( "20x = 2400
\n" ); document.write( "x = 120 L of 50% insecticide\r
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