Solve the following equations for the given variables.

$$c = 18$$

The value of $c$ is $\boxed{\text{18}}$.

$$b = 51$$

The value of $b$ is $\boxed{\text{51}}$.

$$c = 23$$

The value of $c$ is $\boxed{\text{23}}$.

$$d = 96$$

The value of $d$ is $\boxed{\text{96}}$.

$$e = 4$$

The value of $e$ is $\boxed{\text{4}}$.