document.write( "Question 1033433: How much pure water must be added to 4.5 litres of 87% acid solution to dilute it to 64% solution ? \n" ); document.write( "

Algebra.Com's Answer #648059 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+x+\"$ = liters of pure water to be added
\n" ); document.write( " $\"+.87%2A4.5+=+3.915+\"$ liters of pure acid in 87% solution
\n" ); document.write( "----------------------
\n" ); document.write( " $\"++3.915+%2F+%28+x+%2B+4.5+%29+=+.64+\"$
\n" ); document.write( " $\"+3.915+=+.64%2A%28+x+%2B+4.5+%29+\"$
\n" ); document.write( " $\"+3.915+=+.64x+%2B+2.88+\"$
\n" ); document.write( " $\"+.64x+=+1.035+\"$
\n" ); document.write( " $\"+x+=+1.6172+\"$
\n" ); document.write( "1.6172 liters of pure water should be added
\n" ); document.write( "-------------------
\n" ); document.write( "check:
\n" ); document.write( " $\"++3.915+%2F+%28+x+%2B+4.5+%29+=+.64+\"$
\n" ); document.write( " $\"++3.915+%2F+%28+1.6172+%2B+4.5+%29+=+.64+\"$
\n" ); document.write( " $\"+3.915+%2F+6.1172+=+.64+\"$
\n" ); document.write( " $\"+.639999+=+.64+\"$
\n" ); document.write( "OK -error due to rounding off \n" ); document.write( "

\n" );