I need help on this one

What 2 forces allow things to fall ‍♀️‍♀️

Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x

In the diagram, gef and hef are congruent. what is the value of x