I do some revisions to my equation but I still got no answer. It says that there is no enough input argument. Can someone please help me?

function f=rle(x)

f(1)=x(2)+x(3)+x(5)+x(7)-2758.6474;

f(2)=2*x(1) + 2*x(4) + 4*x(5)-5684.5402;

f(3)=x(2) +2*x(3)+x(4)-4292.1525;

f(4)=2*x(6)-6422.3564;

f(5)=((x(1)^3)*(x(2))/(x(4)*x(5)))-(1893.12055);

f(6)=(x(1)*x(3))/(x(2)*x(4))-(0.7631343);

f(7)=((x(1)*x(2))/x(4))-(32.200985);

>> x0=[150;150;150;150;150;150;150];

x=fsolve(rle,x0);

Not enough input arguments.

Error in rle (line 2)

f(x)=x(2)+x(3)+x(5)+x(7)-2758.6474;

Answer 1

[VBBV]

x0=[150;150;150;150;150;150;150];
% x = 1:7; % give input vector to fucntion
sol=fsolve(@rle,x0)  % call the function using function handle 

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.

sol = 7×1

1.0e+03 * 0.1914 0.2365 1.3252 1.4052 0.6228 3.2112 0.5741

plot(sol)

function f=rle(x)
f(1)=x(2)+x(3)+x(5)+x(7)-2758.6474;
f(2)=2*x(1) + 2*x(4) + 4*x(5)-5684.5402;
f(3)=x(2) +2*x(3)+x(4)-4292.1525;  
f(4)=2*x(6)-6422.3564;
f(5)=((x(1)^3)*(x(2))/(x(4)*x(5)))-(1893.12055);
f(6)=(x(1)*x(3))/(x(2)*x(4))-(0.7631343);
f(7)=((x(1)*x(2))/x(4))-(32.200985); 
end

[Alex Sha]

There are multi-solutions:

No.	 1	                 2
x1	-206.504477863007	191.355831175864
x2	-249.192353855846	236.471139659005
x3	1471.63884269976	1325.22038022388
x4	1598.06716845633	1405.24059989323
x5	725.353704703337	622.836834465451
x6	3211.1782	3211.1782
x7	810.847206452752	574.119045651664