Let's read a brilliant book
Algebra
Level
2
ALICE read 2/3 of a book. He calculated that he read 90 pages more than the rest of it. How many pages does the book have?
The answer is 270.
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Let the number of pages be x. So, Alice had read 2x / 3 pages. No. of pages left = x / 3. So, the number of pages he read = 90 + x / 3. Hence, the equation stands: 2x / 3 = 90 + x / 3. or, x / 3 = 90. hence x = 270 pages.