In this task, you are given a list of integers and an integer k. You need to add integer k to each element in the list and return the updated list.

[280, 160, 91, 129, 111, 13, 217, 243, 147, 207, 132, 27, 10, 240, 221, 209, 42, 31, 173, 265] k=20
[300, 180, 111, 149, 131, 33, 237, 263, 167, 227, 152, 47, 30, 260, 241, 229, 62, 51, 193, 285]