Hi,

We know the toll has to be paid a certain number of times for each trip and is the same, and the running cost will be the same per hour (fuel per hour). The total cost of each trip is known, so if we write the various costs of each trip we get the known total.

Try solving these equations for X and Y. X will be the cost of the toll and Y will be the cost per hour of the trip.

8x + (19+1/6)y = 155

2x + (21+2/3)y = 140

(If you don't get along with fractions very well, you might like to convert the times to minutes, then multiply the final answer by 60)

Have a go at it and let me know if you'd like a worked solution...

[Ans: Toll = $5, Fuel = $6/hr]