Question 798638
Constant speeds
In each hour 450/3 miles travelled = 150
12 miles for faster train leaves 138 for both
/2. 69mph for slower (east); (+12) 81 mph for faster (west)


Same by formula 450=3e + 3(e+12) = 6e + 36
{{{e=(450-36)/6 = 414/6 }}}
East=69; west=81