You know a=-5 so you can plug this value of a into your equation,
|4(-5)-2| +(-5) - 5
You would then multiply 4 and -5 together in the absolute value,
|-20 - 2| +(-5) - 5
You would then combine -20 and -2 by adding them together,
|-22| +(-5) - 5
You would then, since -22 is under absolute value bars, make it just 22,
22 +(-5) - 5
You would then add 22 to -5 which would give you 17,
17 - 5
Finally, you would subtract 5 from 17,
12 is your final answer