Final answer:
The missing number in the equation 8 - ? + 11 - 2 = 8 is 9. By combining like terms and isolating the missing number, we can find that ? = 9 to satisfy the equation.
Step-by-step explanation:
The student is asking for help with a simple arithmetic problem that involves finding a missing number. To solve for the missing number, we need to perform some basic algebraic manipulation. Starting with the original equation 8 - ? + 11 - 2 = 8, the goal is to find the value of the question mark that makes the equation true. First, combine like terms by adding the numbers on the left-hand side that don't include the question mark:
8 + 11 = 19
19 - 2 = 17
So, now we have: 17 - ? = 8.
To isolate the missing number, we subtract 17 from both sides of the equation:
17 - ? - 17 = 8 - 17
- ? = -9
Solving for the missing number, we find that:
? = 9
Thus, the missing number in the equation is 9.