We are given both equations, in order to find the interception point of these lines we equal their values

We now use this value for x and replace it in either equation

Therefore, the interception point of these lines is (23,570)
This interception point is the equilibrium point, the question states that y is the number of items produced and x is their price, because of that, we have that the selling price is $23/item and the amount of items is 570