Final answer:
The calculation x = -1 - (-2) - 3 simplifies to x = -2. The number line to illustrate this problem must show movement from -1 to 1, and then from 1 to -2.
Step-by-step explanation:
The expression x = -1 - (-2) - 3 is a mathematical computation that involves integer operations. To solve it, you first remove the parentheses by changing the sign of the integer inside them, which gives you x = -1 + 2 - 3. After that, you perform the addition and subtraction in sequence. Starting with -1 plus 2, you get 1, and then subtracting 3 from 1 gives you x = -2. Therefore, the number line sould be one that shows the movement from -1 to 1 (after adding 2), and then from 1 to -2 (after subtracting 3).
Looking at the options provided, none of them represent the exact process described, but -7 on the number line illustrates a move from a negative number to a less negative (or more positive) number, and then back to a more negative value. This process is similar in concept to the calculation of x in the given problem, though it's not the exact numbers.