Question

16. After reading7/9 of a
book, 40 pages are left. How many pages are there in the book?
​

Answer 1

Answer: 180 pages

Step-by-step explanation:

First we can use the 7/9 to find what is 40 page so..

1-7/9 = 2/9

40 pages = 2/9 of the book

40/ 2 = 20

20= 1/9

20*9= 180

Answer 2

Answer:

180 pages

Step-by-step explanation:

let the no. of pages in the book be x . After reading 7/9 of the book 40 pages are left. Therefore, 7x/9 +40 = x

7x + 9(40) =x*9

7x+360=9x

2x=360

x=360/2 =180

therefore there are 180 pages in the book.

we can check the answer by substituting 180 in the equation