A stapler cost $1.50. A notebook cost $12.50 more than the stapler. Esther spent $153 on such staplers and notebooks. She bought twice as many staplers as notebooks.
- How many notebooks did Esther buy?
- How much money did Esther spend on the staplers?
|
Staplers |
Notebooks |
Total |
Number |
2 u |
1 u |
|
Value |
1.50 |
14 |
|
Total value |
3 u |
14 u |
153 |
(a)
Cost of a notebook
= 12.50 + 1.50
= $14
Total cost of staplers and notebooks
= 3 u + 14 u
= 17 u
17 u = 153
1 u = 153 ÷ 17 = 9
Number of notebooks that Esther bought
= 1 u
= 9
(b)
Amount that Esther spent on staplers
= 3 u
= 3 x 9
= $27
Answer(s): (a) 9; (b) $27