document.write( "Question 1118679: At Shen's auto shop, it takes him 15 minutes to do an oil change and 20 minutes to do a tire change. Let x be the number of oil changes he does. Let y be the number of tire changes he does. \n" ); document.write( "
Algebra.Com's Answer #734060 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
So, what is the question?
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "
\n" );