Question 757830
Freight train is {{{30*5=150}}} miles from San Francisco when the passenger train just begins departing from San Francisco.


Setting time, x = 0 when the passenger train starts, distances from San Francisco are:

Freight: {{{150+30*x}}}
Passenger: {{{55*x}}}
Question:  When are the distances for each train from San Francisco equal? HOW FAR ARE THEY FROM San Francsisco AT THAT TIME?


{{{150+30x=55x}}}
{{{(55-30)x=150}}}
{{{25x=150}}}
{{{highlight(x=6)}}} hours


Pick either distance equation.  The two trains are {{{55*25=highlight(1375)}}} miles from San Francisco.