ALL of these questions require that you know RATE * TIME = DISTANCE
Distance is the same for both ways on her trip d
rateu =x
rated = x+22
x * 6 = d on the way up to the mts and (x+22) * 4 =d on the way back (they are equal d)
x*6 = (x+22)*4 solve for x her rate going up....then
distance = rate * time = x * 6