|-15|-|8-11| how do I solve this

|-15| - |8-11|

First you would find the values of whatever is inside the absolute value lines. Whatever numbers are in the absolute value notation come out positive.

So:

|-15| = 15

And:

|8-11| = |-3| (first you do the operations in the absolute value)

|-3| = 3

So the expression simplifies to:

15 - 3

= 12