Solve c=lambda*f

$$c = \lambda \cdot f$$

Solve for f

$$\left\{\begin{matrix}f=\frac{c}{\lambda }\text{, }&\lambda \neq 0\\f\in \mathrm{R}\text{, }&c=0\text{ and }\lambda =0\end{matrix}\right.$$

Steps for Solving Linear Equation

Swap sides so that all variable terms are on the left hand side.

$$\lambda f=c$$

Divide both sides by \lambda .

$$\frac{\lambda f}{\lambda }=\frac{c}{\lambda }$$

Dividing by \lambda undoes the multiplication by \lambda .

$$f=\frac{c}{\lambda }$$

Solve for c

$$c=f\lambda$$