document.write( "Question 569130: it is necessary to have a 70% antifreeze solution in a radiator of a certain car. the radiator now has 20 ml of 60% solution. how much of this solution should be drained and replaced with 100% antifreeze to get the desired strength \n" ); document.write( "
Algebra.Com's Answer #367245 by lwsshak3(11628)\"\" \"About 
You can put this solution on YOUR website!
it is necessary to have a 70% antifreeze solution in a radiator of a certain car. the radiator now has 20 ml of 60% solution. how much of this solution should be drained and replaced with 100% antifreeze to get the desired strength.
\n" ); document.write( "**
\n" ); document.write( "x=ml of 60% solution to be drained and replaced with 100% antifreeze
\n" ); document.write( "20-x=ml of 60% solution remaining
\n" ); document.write( "..
\n" ); document.write( "60%(20-x)+100%x=70%*20
\n" ); document.write( "12-0.6x+x=14
\n" ); document.write( "0.4x=2
\n" ); document.write( "x=5 ml
\n" ); document.write( "ans:
\n" ); document.write( "ml of 60% solution to be drained and replaced with 100% antifreeze=5
\n" ); document.write( "
\n" );