
Andrew M. answered 05/22/18
Tutor
New to Wyzant
Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors
Let b = number of books
4b + 2 ≤ 30
4b ≤ 28
b ≤ 7
He can buy a maximum of 7 books
4(7)+2 = 28+2 = 30