Answered

John picked up 2/3 of the books on the shelf. Mario picked up 18 books that were left. How many books were on the shelf to begin with?



Answer :

Marver1ck

Answer:

54 books

Step-by-step explanation:

3/3 - 2/3 = 1/3

Mario then picked up 18 books from the remaining (1/3) books.

We have the equation:

(1/3)x - 18 = 0

(1/3)x = 18

x = 54 books

So, there were 54 books on the shelf to begin with.