how many pages are in the book

Question

On Monday a boy read 1/8 of a book. Tuesday he read 30 more pages. Wednesday, he read the reamining 25%. How many pages are in the book

Answer 1

b/8 +30 = (100%-25%)b = .75b = 3b/4

b +240 = 6b

5b = 240

b = 240/5 = 48 pages total in the book

he read 6 pages which were 1/8 of 48

then 30 more for a total 36 pages

which left 12 pages which are 25% of 48