How do I isolate a letter in some equation?

i.e. I have an equation: 2=2*x.^2; or 2=2*log(x).^2; How can I get the value of x in MatLab?

Answer 1

[James Tursa]

symvar is probably what you are looking for. E.g.,

>> eqn = '2=2*log(x).^2';
>> symvar(eqn)
ans = 
    'x'

EDIT:

To solve for x, make a symbolic expression that you want to equal 0, and pass that to the solve() function:

>> syms x
>> eqn = 2*log(x).^2-2;
>> solve(eqn)
ans =
   exp(1)
 1/exp(1)

[Felipe Miotto]

Actually I'm trying to get the result of x; For instance, if I had 10=x.^3 the result expected would be 2.15