Several books are placed on the bottom three shelves of a bookcase. When 1 book was taken from the first shelf, 2 books were taken from the second shelf, 3 books were taken from the third shelf, and all these books were placed on the top fourth shelf, the quantity of books on all the shelves became equal. How many books are in the bookcase?

Total book in the book case=42 books

Step-by-step explanation:

Bottom three shelves

First shelf= one book taken

Second shelf=two books taken

Third shelf=3 books taken

Total books taken=1+2+3

=6 books

All taken books are placed on the top fourth shelf

Top fourth shelf=6 books

The quantity of books on all the shelves became equal when 6 books are placed on the top fourth shelf.

This means, there are 6 books in each shelf

Total shelves=bottom 3 shelves+ top 4 shelves

=3+4

=7 shelves

The book case has 7 shelves in total.

Each book shelf has 6 books

Total books in the book case=7 shelves × 6 books

=42 books

john got lost so he didn't know what to do and it was crazy because he didn't except it

step-by-step explanation:

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y=3x+4

step-by-step explanation:

given the points a(0,4) and b(-4, -8)

eqn of line ab: (y-4)/(x-0)=(-8-4)/(-4-0)

(y-4)/x=-12/-4=3

y=3x+4