What is 28-(-x)-|10| when x=-15

Absolute value bars guarantee that the answer is positive; if the number inside the absolute value bars is already positive, the answer remains positive. --->  |10|  =  10

28 - (-x) - |10|

--->   28 - (-15) - |10|

--->   28 + 15 - 10

--->   43 - 10

--->   33