How do I solve a simple equation with symbolic variables?

I currently have the following

syms k
%then after some steps of differentiation and substitution I get to
p=(k-3)/(k+2)

I want to find the value of k such that p=-1. How do I do this? My version of Matlab doesn't have the solve function but I am sure there must be a simpler way to work this out (edit: I was wrong - it does). Thanks!

Answer 1

[Star Strider]

There are likely many ways to do it.

One is:

syms k p
%then after some steps of differentiation and substitution I get to
p = -1;
Eqn = p == (k-3)/(k+2);
k = vpasolve(Eqn, k)

k =

0.5

Answer 2

[Walter Roberson]

Every version of the symbolic toolbox has supported solve() right back to the very first.

Not every version of the Symbolic Toolbox has supported using "=" or "==", so for those older versions if you have the expression A=B then you solve((A)-(B))