document.write( "Question 748971: A chemist needs to mix a solution that is 15% herbicide with a solution that is 30% herbicide to make 20 liters of a solution that is 19.5% herbicide. How much of each solution should she use? \n" ); document.write( "
Algebra.Com's Answer #455736 by checkley79(3341)![]() ![]() ![]() You can put this solution on YOUR website! .30X+.15(20-X)=.195*20 \n" ); document.write( ".30X+3-.15X=3.9 \n" ); document.write( ".15X=3.9-3 \n" ); document.write( ".15X=.9 \n" ); document.write( "X=.9/.15 \n" ); document.write( "X=6 LITERS OF 30% MIX IS USED. \n" ); document.write( "PROOF: \n" ); document.write( ".30*6+.15(20-6)=.15*20 \n" ); document.write( "1.8+.15*14=3.9 \n" ); document.write( "1.8+2.1=3.9 \n" ); document.write( "3.9=3.9 \n" ); document.write( " |