Evaluate linear expressions with negative values

Replace each letter with its value. Put parentheses around negative values.

1. Evaluate 4x − 4 when x = 6.
2. Evaluate −x − 2 when x = 2.
3. Evaluate −5x + 4 when x = −4.
4. Evaluate −2x + 5 when x = −2.
5. Evaluate x + 2 when x = −5.
6. Evaluate −7x + 4 when x = 3.
7. Evaluate −5x + 2 when x = −2.
8. Evaluate −7x + 8 when x = 5.
9. Evaluate 6x + 1 when x = −9.
10. Evaluate −5x − 6 when x = −1.
11. Evaluate −4x − 11 when x = 6.
12. Evaluate −2x − 12 when x = 6.
13. Evaluate −5x − 1 when x = −11.
14. Evaluate 3x − 13 when x = 1.
15. Evaluate 12x − 6 when x = −10.
16. Evaluate 5x + 6 when x = −5.
17. Evaluate 20x − 2 when x = −14.
18. Evaluate −15x + 16 when x = −13.
19. Evaluate −x − 12 when x = 10.
20. Evaluate x − 9 when x = −1.