document.write( "Question 29942: How many litres of pure hydrochloric acid must be mixed with 3 liters of 20% hydrochloric acid to make 50% hydrochloric acid? Thanks for the help \n" ); document.write( "
Algebra.Com's Answer #16720 by Paul(988)\"\" \"About 
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Let the solution be x\r
\n" ); document.write( "\n" ); document.write( "Equation:
\n" ); document.write( "3(20)=50(x-3)
\n" ); document.write( "60=50x-150
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\n" ); document.write( "x=4.2\r
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\n" ); document.write( "\n" ); document.write( "Hence, about 4.2L of hydrocholric acid is needed.
\n" ); document.write( "Paul.
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