The problem asks to find the missing number in the equation $? - 8 = -10$.

1. Problem Description

The problem asks to find the missing number in the equation $? - 8 = -10$.

2. Solution Steps

Let the missing number be $x$. The equation can be written as $x - 8 = -10$.

To find the value of $x$, we can add 8 to both sides of the equation:

$x - 8 + 8 = -10 + 8$

$x = -2$

3. Final Answer

The missing number is -2.