My teacher today solved this system of equations for us that consisted of these 3 equations,
1) p0 + p1 =1 2) a*p0 + b*p1 =p0 3) c*p0 + d*p1 =p1
, like this!
First he wrote this equation:
p0= (p1 - d*p1)/c
Second he wrote this equation(THE PROBLEM):
c= p1 - d*p1 + c*p1
And last was this equation :
p1= c/(1 - d + c)
He did it so fast without really explaining anything and only after lesson I understood that I do not know how did he got the second equation!
Can anyone please explain how did he got the 2nd equation in his offered solution????