Q: Three planes are flying parallel to one another. The distance between plane 1 and plane 2 is half the distance between plane 2 and plane 3. Plane 2 is flying along the path given by the equation 3x-4y=17. When plane 1 is at the point (4,5), how far (in metres) is plane 2 from plane 3?
*Ik the answer is 10 metres but how do you get the answer?*