State space equation from differential equation I have very general system. I don't know whether it is electrical or mechanical or whatever. This system can be modeled by the following differential equation

$$\dot q = \frac{Tf_1-f_2}{T+1}$$

where:


$\dot q$ would be equivalent to current in an electrical system
$f_1$ and $f_2$ would be equivalent to current sources 
$T$ is a given constant


From what I see, if $f_1$ and $f_2$ are constant, there is no way for $\dot q$ to change. How is it possible that this system has a state space representation? And how do I get this state space representation?
Assuming that the inputs are $f_1$ and $f_2$,

$$\dot q = 0 \cdot q + \begin{bmatrix} \quad\left(\frac{T}{T+1}\right)\\ - \left(\frac{1}{T+1}\right)\end{bmatrix}^\top \begin{bmatrix} f_1\\ f_2\end{bmatrix}$$

Since you have not specified the outputs, the output equation cannot be written.