I have the following system:

$\displaystyle A\frac{\sin (B(f_1 - f_0))}{B(f_1 - f_0)} = X_1$

$\displaystyle A\frac{\sin (B(f_2 - f_0))}{B(f_2 - f_0)} = X_2$

where the unknowns are $\displaystyle A$ and $\displaystyle f_0$.

Can you solve such a system analytically? I can reduce it to k*sinc(...) = sinc(...) but what do I do from there?