Question

Solve for D

4−d<4+d



d>8

d>−8

d>−4

d>0

Answer 1

4 - d < 4 + d
- 4 - 4
__________________
-d < d
- d - d
___________________
(-1) -2d < 0 (-1)

2d > 0
------ -----
2 2

d > 0

I hope this at least helps you to understand this problem.