The brady family

Question

The Brady family received pieces of mail on December 21. The mail consisted of magazines, letters, bills, and ads. How many magazines did they receive if they received three more letters than bills, five more ads than letters, and the same number of magazines as bills?

Answer 1

L = 3+b, a=5+L, m=b

a+b+L +m= T = Total number of pieces of mail

5+L+ L-3 + L +L-3 = T

4L =T+1

if T = 15 then

L = 4, b = 1, a = 9 and m =1 and only 1 magazine received by Brady family Dec. 21st