The set of two opposite numbers that equal 0 when combined consists of a number and its negative. For example, if you take the number \( a \), its opposite is \( -a \). When you add these two together:
\[ a + (-a) = 0 \]
Thus, any integer \( n \) and its opposite \( -n \) will add up to zero:
- For \( n = 5 \), the opposite is \( -5 \); \( 5 + (-5) = 0 \).
- For \( n = -3 \), the opposite is \( 3 \); \( -3 + 3 = 0 \).
So, the general form is \( (n, -n) \) for any integer \( n \).