The following equation gives a relation between the mass `m_(1)` kept on a surface of area A and the pressure p exerted on this area.
`p=((m_(1)+m_(2))x)/(A)`
What must be the dimensions of the quatities x and `m_(2)`?

Explanation

To solve the problem, we need to analyze the given equation and determine the dimensions of the quantities \( x \) and \( m_2 \).

### Step-by-Step Solution:

1. **Understanding the Equation**:
The equation given is:
\[
p = \frac{(m_1 + m_2) \cdot x}{A}
...