Given that ABC three points are on the same straight line, ab = 100 cm, BC = 3 / 5 AB, e is the midpoint of AC, find the length of be? It's better now. I can use it

Given that ABC three points are on the same straight line, ab = 100 cm, BC = 3 / 5 AB, e is the midpoint of AC, find the length of be? It's better now. I can use it

AB=100
BC=3/5*100=60
AC=AB+BC=100+60=160
AE=160/2=80
BE=AB-AE=100-80=20cm