solving equations initially written as strings using fsolve

S H

2019 4 29

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Is it possible to solve the following equations that are initially written as string expressions?

eqns={...
    'x(1)+x(2)+x(3)+x(4)+x(5)+x(6)+x(7)-1';...
    'x(1)-a*x(2)';...
    'x(2)-a*x(3)';...
    'x(3)-a*x(4)';...
    'x(4)-a*x(5)';...
    'x(5)-a*x(6)';...
    'x(6)-a*x(7)'};
for kk=1:7
    myF{kk}=str2func(eqns{kk});
end
funeqns=@(x) myF{:};
a=2;
x0=0.5*ones(1,7);
opts=optimoptions('fsolve','Algorithm','trust-region','TolFun',1e-12,...
    'TolX',1e-12,'Display','off');
fs=fsolve(funeqns,x0,opts)';