Colouring book J has 86 fewer pages than Colouring book K, and Colouring book L has 30 more pages than Colouring book K. If Colouring book J and Colouring book K have a total of 172 pages,
- how many pages does Colouring book K have?
- how many pages does Colouring book L have?
(a)
Number of pages that Colouring book J has = 1 u
Number of pages that Colouring book K has = 1 u + 86
Number of pages that Colouring book L has = 1 u + 86 + 30
Total number of pages that Colouring book J and Colouring book K have
= 1 u + 1 u + 86
= 2 u + 86
2 u + 86 = 172
2 u = 172 - 86
2 u = 86
1 u = 86 ÷ 2 = 43
Number of pages that Colouring book K has
= 1 u + 86
= 43 + 86
= 129
(b)
Number of pages that Colouring book L has
= 1 u + 86 + 30
= 129 + 30
= 159
Answer(s): (a) 129; (b) 159
