If Sam sent three friends an email on Monday and each friend sent an email to 3 friends on Tuesday and total of 3+3*3= 12 emails were sent by Tuesday. on Wednesday each of the friends that received those emails sent it to 3 friends so the total amount of emails sent by Wednesday is:
21 emails were sent by Wednesday. The prime factorization of 21 is 3 x 7
let x and y be the number of chip and pretzel bags respectively :
4x%2B2y%3 C=20
:
if x=1 then 4%281%29%2B2y%3C=20--->{{2y<=16}}}--->y%3C=8 :
if x=3 then 4%283%29%2B2y%3C=20--->{{2y<=8}}}--->y%3C=4 :
so chips 1 and pretzels 8 :
chips 3 and pretzels 4.
