Textbook Q has 23 fewer pages than Textbook R, and Textbook S has 36 more pages than Textbook R. If Textbook Q and Textbook R have a total of 223 pages,
- how many pages does Textbook R have?
- how many pages does Textbook S have?
(a)
Number of pages that Textbook Q has = 1 u
Number of pages that Textbook R has = 1 u + 23
Number of pages that Textbook S has = 1 u + 23 + 36
Total number of pages that Textbook Q and Textbook R have
= 1 u + 1 u + 23
= 2 u + 23
2 u + 23 = 223
2 u = 223 - 23
2 u = 200
1 u = 200 ÷ 2 = 100
Number of pages that Textbook R has
= 1 u + 23
= 100 + 23
= 123
(b)
Number of pages that Textbook S has
= 1 u + 23 + 36
= 123 + 36
= 159
Answer(s): (a) 123; (b) 159
