Determining Steady State using a Glucose Simulink Model

I am trying to determine the steady state of a Glucose Model using Simulink. The code i was provided with as a basis has numerous greek alphabet letters which are not recognized in MATLAB in a script file. I defined the initial conditions and provided the equation that I will be using. If someone could please direct me in the right direction on how I need to proceed, that would be great. I tried to comment out what I am trying to do.

%%%% Define initial conditions µ=7200 ml h-1

Θ = 2.5 mg ml-1

λ = 2470 ml h-1

activeuptake(v)= 139000 mU-1h^-1

Φ = 0.51 mg ml-1

beta(b)= 1430 mU ml mg-1h ^-1

alpha(α) =7600 ml h-1

QL = 8400 mg h-1

d=θ

%%%%%%%Choose correct equation.

QL = λx + νxy, x≤ θ

%%%Find Steady State:Disturb (change) the value of ‘x’, say from 0 to θ.

%%%Let’s call this ‘d’; Find corresponding 'y' value; Use that 'y' value to

%%%find the final 'x'. 4.Store these ‘x’ and ‘y’ values and plot them

%%against the initial disturbance ‘d’

[KayLynn]

basically having difficulties trying to figure out how to find the corresponding value of y after you declare d. Hope this helps to clarify a little bit more where I am having the most difficulties