vpasolve and for loop

I am trying to solve numerically symbolic equation. But one variable in my equation is series of values

zv=1:-0.1:0

So, according to my code:

    zv=1:-0.1:0
    n=length(zv);
    j=1:n;
    C=15;
    eqn=C-64.*(1-zv(j))==0;
    R=vpasolve(eqn,x(j),1)

I got mistake in the last row that

`Index exceeds matrix dimensions`.

Other solution which is working is with for loop, but I dont know how to put all solutions (R) in one variable. I got list in my working space where values are changing and it stops when I use all

`zv`

terms:

    syms x;
    for zv=1:-0.1:0
    C=15;
    eqn=C-64.*(1-zv(j))==0;
    R=vpasolve(eqn,x,1)
    end