Problema Solution
Nancy drives
20 mph faster than her father,
Greg. In the same time that
Nancy travels 180 mi, her
father travels 120 mi. Find
their speeds.
Answer provided by our tutors
120 = t * x
180 = t * ( x + 20)
dividing.
2/3 = x/(x+20)
2x + 40 = 3x
x = 40
so x + 20 = 60