The expression \( p + (-q) \) can be rewritten as \( p - q \). Here, since \( p \) and \( q \) are both positive numbers, the nature of the sum depends on the relationship between \( p \) and \( q \):
- If \( p > q \): Then \( p - q \) is positive.
- If \( p = q \): Then \( p - q = 0\).
- If \( p < q \): Then \( p - q \) is negative.
Therefore, \( p + (-q) = p - q \) can be positive, zero, or negative depending on the relative sizes of \( p \) and \( q \).
In summary, \( p + (-q) \) describes a value that can be positive, zero, or negative based on the comparison between \( p \) and \( q \).