The answers are:
below in boldface
Work/explanation:
First, let's solve x - 12 > 3.
x > 3 + 12
x > 15
Then, we solve x - 12 < 3.
x - 12 < 3
x < 3 + 12
x < 15
Finally, I solve x - 12 = 3.
x = 3 + 12
x = 15
Hence, these are the answers to the two inequalities and the equation.