Finding the speed of a plane

Question

Flying with the wind a plane went 183km/h. Flying into the same wind the plane only went 141km/h. Find the speed of the plane still in still air and the speed of the wind.

Answer 1

suppose w = windspeed & p = plane's speed without any wind.

 

Then      p+w = 183

and also p-w  = 141.

 

Can you solve this system?