The LCD of 33 and 22 is 66
Take the co-ordinates of your triangle and add three to the Y co-ordinates and keep the X co-ordinates the same. Then, graph. The shape should have slid upwards three points.
The two equations are:
y=.17x+35.96
y=.12x+49.96
He would have to drive 280 miles for both of them to cost the same.