From top to bottom it goes:
yes
no
no
yes
X = burger number. 3x-6 = fries sold
3x-6 = 120 solve for x
It would take about 63 hours...
Average speed of cyclist = x
average speed of car = 3x
x = 225/5
x = 45km/h
3x = 3(45)
3x = 135km/h
average speed of cyclist = 45km/h
average speed of car = 135km/h