Guide book N has 72 fewer pages than Guide book P, and Guide book Q has 13 more pages than Guide book P. If Guide book N and Guide book P have a total of 168 pages,
- how many pages does Guide book P have?
- how many pages does Guide book Q have?
(a)
Number of pages that Guide book N has = 1 u
Number of pages that Guide book P has = 1 u + 72
Number of pages that Guide book Q has = 1 u + 72 + 13
Total number of pages that Guide book N and Guide book P have
= 1 u + 1 u + 72
= 2 u + 72
2 u + 72 = 168
2 u = 168 - 72
2 u = 96
1 u = 96 ÷ 2 = 48
Number of pages that Guide book P has
= 1 u + 72
= 48 + 72
= 120
(b)
Number of pages that Guide book Q has
= 1 u + 72 + 13
= 120 + 13
= 133
Answer(s): (a) 120; (b) 133
