81. a negative times a negative is a positive
<span>Ok can't count properly, lets try again one package has 18,
how many ways?
18, 18
18, 6, 6, 6
18, 6, 6, ones
18, 6, ones
18, ones
Therefore, there are 5 ways to buy 36 cookies.
I hope my answer has come to your help. Thank you for posting your question here in Brainly.</span>
