Cindy has 37 envelopes. If Cindy gives 3 envelopes to each of her 5 friends, how many envelopes does she have left? Let's be accurate as possible.
Cindy gave 3 envelopes / friend x 5 friends = 15 envelopes to her friends. Cindy has 37 envelopes - 15 envelopes = 22 envelopes left.
The answer: 22.