Gillian spent
37 of her money on 6 post-it pads and 7 punchers. The cost of one puncher was thrice the cost of one post-it pad. She bought some more punchers with
13 of her remaining money. How many punchers did Gillian buy altogether?
6 post-it pads and
7 punchers |
Remaining amount |
| 3x3 |
4x3 |
| |
More punchers |
Left |
| |
1x4 |
2x4 |
| 9 p |
4 p |
8 p |
Cost of 1 post-it pad = 1 u
Cost of 1 puncher = 3 u
Cost of 6 post-it pads = 6 x 1 u = 6 u
Cost of 7 punchers = 7 x 3 u = 21 u
Total cost of 6 post-it pads and 7 punchers
= 6 u + 21 u
= 27 u
9 p = 27 u
1 p = 27 ÷ 9 = 3 u
Amount that Gillian used to buy more punchers
= 4 p
= 4 x 3 u
= 12 u
Number of more punchers that Gillian bought
= 12 u ÷ 3 u
= 4
Total number of punchers that Gillian bought
= 7 + 4
= 11
Answer(s): 11
