document.write( "Question 607091: How much 87-octane gas and 93-octane gas should Kelsey mix in order to make 12 gal of 91-octane gas for her Legacy? \n" ); document.write( "
Algebra.Com's Answer #382425 by scott8148(6628)\"\" \"About 
You can put this solution on YOUR website!
(x)(87) + (12 - x)(93) = (12)(91) \n" ); document.write( "
\n" );