document.write( "Question 693921: How many liters of each of a 15% acid solution and a 75% acid solution must be used to to produce 90 liters of a 25% acid solution? ( round to two decimal places if necessary.) \n" ); document.write( "
Algebra.Com's Answer #427628 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! How many liters of each of a 15% acid solution and a 75% acid solution must be used to to produce 90 liters of a 25% acid solution? ( round to two decimal places if necessary.) \n" ); document.write( "---------------------- \n" ); document.write( "Equation: \n" ); document.write( "acid + acid = acid \n" ); document.write( "0.15x + 0.75(90-x_ = 0.25*90 \n" ); document.write( "----------------------------- \n" ); document.write( "15x + 75*90 - 75x = 25*90 \n" ); document.write( "-80x = -50*90 \n" ); document.write( "x = (5/8)90 \n" ); document.write( "x = 56.25 liters (amt. 15% solution needed) \n" ); document.write( "----- \n" ); document.write( "90-x + 33.75 liters (amt. of 75% solution needed) \n" ); document.write( "============================================= \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "============== \n" ); document.write( " |