Question 688410
First make your equation.  1200=5(120)+x+2x+3x+4x, adding x for each day after the first.  Simplify that to 1200=600+10x.  take 10 out of it all just to clean it up a bit, so 120=60+x.  simplify further to 60=x.  there is the answer!  The college kids will add 60 miles every day to get to the campus in 5 days.