Cathy spent
37 of her money on 7 post-it pads and 2 markers. The cost of one marker was four times the cost of one post-it pad. She bought some more markers with
15 of her remaining money. How many markers did Cathy buy altogether?
7 post-it pads and
2 markers |
Remaining amount |
| 3x5 |
4x5 |
| |
More markers |
Left |
| |
1x4 |
4x4 |
| 15 p |
4 p |
16 p |
Cost of 1 post-it pad = 1 u
Cost of 1 marker = 4 u
Cost of 7 post-it pads = 7 x 1 u = 7 u
Cost of 2 markers = 2 x 4 u = 8 u
Total cost of 7 post-it pads and 2 markers
= 7 u + 8 u
= 15 u
15 p = 15 u
1 p = 15 ÷ 15 = 1 u
Amount that Cathy used to buy more markers
= 4 p
= 4 x 1 u
= 4 u
Number of more markers that Cathy bought
= 4 u ÷ 4 u
= 1
Total number of markers that Cathy bought
= 2 + 1
= 3
Answer(s): 3
