document.write( "Question 412384: A 90% antifreeze solution is to be mixed with a 75% solution to get 120 liters of a 78% solution. How many liters of the 90% and 75% solutions will be used?\r
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Algebra.Com's Answer #289673 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! A 90% antifreeze solution is to be mixed with a 75% solution to get 120 liters of a 78% solution. How many liters of the 90% and 75% solutions will be used? \r \n" ); document.write( "\n" ); document.write( "----------- \n" ); document.write( "Equation: \n" ); document.write( "active + active = active \n" ); document.write( "0.9x + 0.75(120-x) = 0.78*120 \n" ); document.write( "--- \n" ); document.write( "Multiply thru by 100 to get: \n" ); document.write( "90x + 75*120 - 75x = 78*120 \n" ); document.write( "15x = 3*120 \n" ); document.write( "x = (1/5)*120 \n" ); document.write( "x = 24 liters (amt of 90% solution needed) \n" ); document.write( "120-x = 96 liter (amt of 75% solution needed) \n" ); document.write( "========= \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "========= \n" ); document.write( " |