16. After reading 7/9 of a book, 40 pages are left. How many pages are there in the book?
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Answer:
There were total 180 pages in the book
140 pages were read
Step-by-step explanation:
let the number of pages in the x
the part he read = 7x/9
then = x - 7x/9 = 40
= (9x - 7x)/9 = 40
= 2x = 9*40
= 2x = 360
= X = 360/2
= 180 pages
he read = 180*7/9
= 1260/9
= 140 pages were read
left = 180-140 = 40 pages
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