Mary spent
25 of her money on 6 correction tapes and 5 notebooks. The cost of one notebook was twice the cost of one correction tape. She bought some more notebooks with
14 of her remaining money. How many notebooks did Mary buy altogether?
6 correction tapes and
5 notebooks |
Remaining amount |
| 2x4 |
3x4 |
| |
More notebooks |
Left |
| |
1x3 |
3x3 |
| 8 p |
3 p |
9 p |
Cost of 1 correction tape = 1 u
Cost of 1 notebook = 2 u
Cost of 6 correction tapes = 6 x 1 u = 6 u
Cost of 5 notebooks = 5 x 2 u = 10 u
Total cost of 6 correction tapes and 5 notebooks
= 6 u + 10 u
= 16 u
8 p = 16 u
1 p = 16 ÷ 8 = 2 u
Amount that Mary used to buy more notebooks
= 3 p
= 3 x 2 u
= 6 u
Number of more notebooks that Mary bought
= 6 u ÷ 2 u
= 3
Total number of notebooks that Mary bought
= 5 + 3
= 8
Answer(s): 8
