Let the average temperatures in Centigrade (C) and Fahrenheit (F) be $\overline{\mathbf{C}}$ and $\overline{\mathbf{F}}$. If $\overline{\mathbf{C}}$ and $\overline{\mathbf{F}}$ are related to $\mathbf{F} = \frac{9}{5}\mathbf{C} + 32$, then $\overline{\mathbf{F}}$ and $\overline{\mathbf{C}}$ have the relation: