Question

if a boy reads 3/5 pages of a book in one day and 4/5 pages in another day. There are 30 pages unread, how many pages does the book contain???​

Answer 1

Answer:

75 pages.

Step-by-step explanation:

Let the total number of pages in the book be x.

According to the question,

(3/5 of x) + (4/5 of x) - (30) = x

3x/5 + 4x/5 - 30 = x

(3x + 4x) / 5 = x + 30

7x = 5 (x + 30)

7x = 5x + 150

7x - 5x = 150

2x = 150

x = 150/2

x = 75 pages

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