You start off at -20 on the number line. Then move over to the right 16 places and you get to -4 on the number line. Then move to the left 5 spots and you'll land on -9
Or you can think of -20+16 as 20-16 = 4 and just make the result negative. So we would have -20+16-5 turn into -4-5. At this point, we add the numbers to get 4+5 = 9 and the result is negative because we're adding two negatives. So that's why the answer is -9<span />
