Answer:
4. -(5y - 2) = -5y + 2. (i'm not sure what the objective of this one is.)
5. -15n - 5
6. (if this is altogether the answer is this): -3y + -9/2
(if it's not altogether, the answers are this): The first is already simplified. The second is 1.5. The third is already simplified.
7. (4x + 2) + (6x - 3) = 10x - 1
8. (8a - 10) - (3a - 6) = 5a - 4
9. 5a - 12 = 3 a = 3
10. 10 - 2a = -4 a = 7
11. 11/4 + 3 = -9 (this must have been mistyped)
12. 3/4x = -12 x = -16
13. 4(3p + 6) = 12 p = -1
14. -5(x - 4) = -30 x = -2
15. -3m + 15 > -6 m > -7
bonus. 2/5 (2a + 10) = -8 a = -15
Explanation: