Finding Argument of Bessel Function (1st Kind) to Return Known Solution

I have an equation of the form 0.3005 = J0(2.405x/165) and want to find the value of x (between 0 and 160) that satisfies this equation. How would I go about coding this in Matlab? This is what I have so far.

syms r
ex = 5; 
R = 160; 
F = (2.405*r)/(R + ex);
Ratio = 0.3005; 
q = F == Ratio;
vpasolve(besselj(0,F))

WolframAlpha returns r = 128.15 for this equation, but I can't seem to get this value from Matlab.

Answer 1

[David Goodmanson]

Hello 1:5,

syms r
ex = 5; 
R = 160; 
F = besselj(0,(2.405*r)/(R + ex));
Ratio = 0.3005; 
q = F == Ratio;
vpasolve(q,r,[0 200])
   ans = 128.1492381636410113226607742437

Answer 2

[Sulaymon Eshkabilov]

If you set the solution range, then you will get a positive solution, e.g.:

...
Sol = vpasolve(besselj(0,F), r, [0, 165])