Question

after reading
$\frac{7}{9}$
of a book 40 pages are left how many pages are there in a book

Answer 1

let the total no of pages be x
7x/9+40=x
x-7x/9=40
2x/9=40
x=40×9/2
x=180
pages in book 180

Answer 2

Hey friend, ☺ here is ur answer
Let the total number of pages be x.

Now 7x/9 pages are read.
Left pages = x - 7x/9 = 2x/9

also 2x/9 = 40
x = 180

Total pages = 180 pages.

Hope this helps u..