What about the accounting equation to calculate the liabilities

The accounting equation is:

$$\text{Assets} = \text{Liabilities} + \text{Equity}$$

To calculate liabilities using this equation, you would rearrange it as follows:

$$\text{Liabilities} = \text{Assets} - \text{Equity}$$

This means that liabilities can be determined by subtracting the total equity of a company from its total assets.