document.write( "Question 906017: How many gallons of 80% antifreeze solution must be mixed with 90 gallons of 15% antifreeze solution to get a mixture that is 70%? \n" ); document.write( "
Algebra.Com's Answer #549592 by lwsshak3(11628)\"\" \"About 
You can put this solution on YOUR website!
How many gallons of 80% antifreeze solution must be mixed with 90 gallons of 15% antifreeze solution to get a mixture that is 70%?
\n" ); document.write( "***
\n" ); document.write( "let x=amt of 80% solution to mix\r
\n" ); document.write( "\n" ); document.write( "..
\n" ); document.write( "80%x+15%*90=70%(90+x)
\n" ); document.write( ".80x+13.5=63+.70x
\n" ); document.write( ".10x=49.5
\n" ); document.write( "x=495
\n" ); document.write( "amt of 80% solution to mix with 90% solution=495 gallons
\n" ); document.write( "
\n" ); document.write( "
\n" );