How can I plug a solution from an equation back into another endlessly?

I have two equations, for example:

A=x+yz+B
B=l+p-A

assuming everything but A and B are constants, and I know an initial A or B (so I can get one solution) how can I take that answer and plug it in for the next solution, and iterate through solutions until either zero or set amount of solutions has occurred?

[A Jenkins]

What have you tried?

Answer 1

[Image Analyst]

Try a while loop:

A=1
B=1
x=2
y=3
z=4
l=6
p=7
tolerance = 9999999
loopCounter = 1; % Failsafe - max # loops.
while tolerance > 0.1 && loopCounter < 100
  A=x+y*z+B
  B=l+p-A
  tolerance = abs(A) % Whatever ending condition you want.
  loopCounter = loopCounter + 1;
end