document.write( "Question 472734: How many liters of 20% alcohol solution should be added to 40 liters of a 50% alcohol solution to make a 30% solution? \n" ); document.write( "
Algebra.Com's Answer #324077 by monika_p(71)\"\" \"About 
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x- liters of 20% alc. solution
\n" ); document.write( "(x+40) - total liters of 30% solution
\n" ); document.write( " x*20%+40*50%=(x+40)*30%
\n" ); document.write( "0.2x+40*0.5=(x+40)*0.3
\n" ); document.write( "0.2x+20=0.3x+12
\n" ); document.write( "0.1x=8
\n" ); document.write( "x=80
\n" ); document.write( "You have to add 80 liters of 20% alc. solution
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