not enough input arguments using variables from another equation system

Hi, Im modeling a series of cstr

clc
clear
close all

x1 = [0;0;0];
x = fsolve(@TAC1,x1)

Equation solved.

fsolve completed because the vector of function values is near zero
as measured by the value of the function tolerance, and
the problem appears regular as measured by the gradient.

x = 3×1

0.0688 0.0259 0.0026

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function y = TAC1(x)
    eq1 = 7*x(1)+0.437*(x(1)^0.5)*(x(2)^0.5)-5/10;
    eq2 = 7*x(2)+0.437*(x(1)^0.5)*(x(2)^0.5)-2/10;
    eq3 = 0.437*(x(1)^0.5)*(x(2)^0.5)-7*x(3);
    y=[eq1,eq2,eq3];
end


z2 = [0;0;0];
z = fsolve(@TAC2,z2)

Not enough input arguments.

Error in solution>TAC2 (line 19)
eq4 = 7*x(1)-8*z(1)-0.437*(z(1)^0.5)*(z(2)^0.5);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Error in fsolve (line 167)
fuser = feval(funfcn{3},x,varargin{:});
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Caused by:
Failure in initial objective function evaluation. FSOLVE cannot continue.

function y = TAC2(x,z)
    eq4 = 7*x(1)-8*z(1)-0.437*(z(1)^0.5)*(z(2)^0.5);
    eq5 = 7*x(2)-8*z(2)-0.437*(z(1)^0.5)*(z(2)^0.5)+1/100;
    eq6 = 7*x(3)-8*z(3)+0.437*(z(1)^0.5)*(z(2)^0.5);
    y=[eq4,eq5,eq6];
end

this is what i have so far, i also tried to make the first 3 results as variables but that didnt work.

[Stephen23]

https://www.mathworks.com/help/matlab/math/parameterizing-functions.html

Answer 1

[Matt J]

z = fsolve(@(z)TAC2(x,z) ,z2)