The answer is 71
Hoped I help! Byejejdkdjdkkddikdeidkkeskeooslslsldldldleodkekdkdkekkekelelsisisowowwsuwisiwisisisiosowoowowssiisisisisisissiissiisisisisssosoosossososososossoosososossos
__Award Brainliest if helped!Layman : The number of the largest power
Say

, Degree is 2 (X^2)
and if

, the Degree is 3.
Technical : Largest exponent of variable.
If one book = 1/8, then you can just multiply it by 3, for the three mystery books. 8x3= 24, so tony has 24 books in all.