Ava set her watch 2 seconds behind, every day it sets back 1 second. How many days has it been since she last set her watch if it is 41 seconds behind?
Right now: Watch is 2 seconds behind
Let d be the day after right now
(1)d + 2 = 41
d + 2 = 41
Subtract 2 from each side
d = 39
Right now: Watch is 2 seconds behind
Let d be the day after right now
(1)d + 2 = 41
d + 2 = 41
Subtract 2 from each side
d = 39