document.write( "Question 556911: from 2 stock solutions 18% and 42% you are to prepare 1.5 liters of a 34% solution. How many milligrams of each stock do you need? \n" ); document.write( "
Algebra.Com's Answer #362322 by stanbon(75887) ![]() You can put this solution on YOUR website! from 2 stock solutions 18% and 42% you are to prepare 1.5 liters of a 34% solution. How many milligrams of each stock do you need? \n" ); document.write( "----- \n" ); document.write( "Equation: \n" ); document.write( "active + active = active \n" ); document.write( "0.18x + 0.42(1.5-x) = 0.34*1.5 \n" ); document.write( "---- \n" ); document.write( "Multiply thru by 100 to get: \n" ); document.write( "18x + 42*1.5-42x = 34*1.5 \n" ); document.write( "-24x = -18 \n" ); document.write( "x = 3/4 liters (amt of 18% solution needed) \n" ); document.write( "--- \n" ); document.write( "1.5-x = 3/4 liters (amt of 42% solution needed) \n" ); document.write( "================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "============= \n" ); document.write( " |