Guide book R has 84 fewer pages than Guide book S, and Guide book T has 29 more pages than Guide book S. If Guide book R and Guide book S have a total of 156 pages,
- how many pages does Guide book S have?
- how many pages does Guide book T have?
(a)
Number of pages that Guide book R has = 1 u
Number of pages that Guide book S has = 1 u + 84
Number of pages that Guide book T has = 1 u + 84 + 29
Total number of pages that Guide book R and Guide book S have
= 1 u + 1 u + 84
= 2 u + 84
2 u + 84 = 156
2 u = 156 - 84
2 u = 72
1 u = 72 ÷ 2 = 36
Number of pages that Guide book S has
= 1 u + 84
= 36 + 84
= 120
(b)
Number of pages that Guide book T has
= 1 u + 84 + 29
= 120 + 29
= 149
Answer(s): (a) 120; (b) 149
