Rachel spent
25 of her money on 9 markers and 5 post-it pads. The cost of one post-it pad was thrice the cost of one marker. She bought some more post-it pads with
14 of her remaining money. How many post-it pads did Rachel buy altogether?
9 markers and
5 post-it pads |
Remaining amount |
| 2x4 |
3x4 |
| |
More post-it pads |
Left |
| |
1x3 |
3x3 |
| 8 p |
3 p |
9 p |
Cost of 1 marker = 1 u
Cost of 1 post-it pad = 3 u
Cost of 9 markers = 9 x 1 u = 9 u
Cost of 5 post-it pads = 5 x 3 u = 15 u
Total cost of 9 markers and 5 post-it pads
= 9 u + 15 u
= 24 u
8 p = 24 u
1 p = 24 ÷ 8 = 3 u
Amount that Rachel used to buy more post-it pads
= 3 p
= 3 x 3 u
= 9 u
Number of more post-it pads that Rachel bought
= 9 u ÷ 3 u
= 3
Total number of post-it pads that Rachel bought
= 5 + 3
= 8
Answer(s): 8
