# After reading 7/9 of a book 40 pages are left.How many pages are their in a book?

reading pages = 7/9*x = 7x/9

page left = 40

so

x - 7x/9 = 40

(9x - 7x)/9 = 40

3x/9 = 40

3x = 40*9 = 320

x = 360/3

x = 120

Hence there are 120 pages in a book.

reading pages = 7/9*x = 7x/9

page left = 40

so

x - 7x/9 = 40

(9x - 7x)/9 = 40

3x/9 = 40

3x = 40*9 = 320

x = 360/3

x = 120

Hence there are 120 pages in a book.

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