Question

Evaluate the expression | x - 8 | when x = -4.

Answer 1

replace x with -4 and evaluate

| x - 8 |

| -4 - 8 |

| -12 |

12

so, | x - 8 | = 12 when x = -4

Answer 2

|-4-8|
Do the inside first and then whatever you get as the answer, you make it positive :)