document.write( "Question 338141: one solution is 20% acid and another is 12%. How many cubic centimeters of each solution should be mixed to obtain 100 cubic centimeters of a solution that is 15% acid. \n" ); document.write( "
Algebra.Com's Answer #242391 by checkley77(12844)\"\" \"About 
You can put this solution on YOUR website!
.20x+.12(100-x)=.15*100
\n" ); document.write( ".20x+12-.12x=15
\n" ); document.write( ".08x=15-12
\n" ); document.write( ".08x=3
\n" ); document.write( "x=3/.08
\n" ); document.write( "x=37.5 cm^3 of 20% solution is used.
\n" ); document.write( "100-37.5=62.5 cm^3 of 12% solution is used.
\n" ); document.write( "Proof:
\n" ); document.write( ".20*37.5+.12*62.5=.15*100
\n" ); document.write( "7.5+7.5=15
\n" ); document.write( "15=15
\n" ); document.write( "
\n" );