# mathematics

She reads 30 pages of the book per day. After three days of reading, 5/8 of the book are left. How many pages are in this book?

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1. 240 pages

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2. Can you show work please

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3. sure

she reads 30 pages of the book and she reads for 3 days, so 30 x 3 = 90

5/8 of the book are left, so she read 3/8 of the book. which means 3/8 of the book = 90 pages

you can use x as the length of the book, so 3/8(x) = 90

multiply both sides by 8/3:
x = 240

so there are 240 pages in the book

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