document.write( "Question 1025799: For an experiment, a chemist needs 12 liters of a solution that is 30% hydrochloric acid. However, she only has two solutions that are 25% hydrochloric acid and 40% hydrochloric acid. How many liters of each should she mix in order to obtain the needed solution? \r
\n" ); document.write( "\n" ); document.write( "I didn't understand it. Please help! Thanks! \n" ); document.write( "
Algebra.Com's Answer #641108 by mananth(16946)\"\" \"About 
You can put this solution on YOUR website!
Acid %
\n" ); document.write( " percent ---------------- quantity
\n" ); document.write( "Solution I 25.00% ---------------- x liters
\n" ); document.write( "Solution II 40.00% ------ 12 - x liters
\n" ); document.write( "Mixture 30.00% ---------------- 12
\n" ); document.write( " 12
\n" ); document.write( "25.00% x + 40.00% ( 12 - x ) = 30.00% * 12
\n" ); document.write( "25 x + 40 ( 12 - x ) = 360
\n" ); document.write( "25 x + 480 - 40 x = 360
\n" ); document.write( "25 x - 40 x = 360 - -480
\n" ); document.write( "-15 x = -120
\n" ); document.write( "/ -15
\n" ); document.write( " x = 8 liters 25.00% Solution I
\n" ); document.write( " 4 liters 40.00% Solution II
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\n" ); document.write( "m.ananth@hotmail.ca
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