In the Fuedal system an individuals social status was generally determined by what ?

Manorialism was the cornerstone of European society in the Middle Ages. Nobility who held land, the only thing of value during the period, ruled these manors. ...

It was generally characterized by the absence of public authority and the exercise by local lords of administrative and judicial functions formally (and later) performed by centralized governments.

Where I got my answer from:

https://www.britannica.com/topic/feudalism

some american cities felt workers were being oppressed by business monopolies

the perimeter of a triangle is 69 cm. side a is 5 cm shorter than side b. side c is twice as long as side a. find the length of each side. i need to know how to do it in 2 equations.  

equations:

a = b-5

c = 2a

a + b + c = 69