Question 896281
let her rate downhill = r
let her rate uphill = r-1
the distance is the same which we'll call d.


rate * time = distance.


going downhill this becomes d = 2r
going uphill this becomes d = 3(r-1)


since the distance is the same, you can set these equations equal to each other to get:


you get 2r = 3*(r-1)


that's your equation.


you then solve for r which answers the question because r represents the rate of travel going downhill.