Cathy spent
25 of her money on 4 pens and 7 markers. The cost of one marker was four times the cost of one pen. She bought some more markers with
14 of her remaining money. How many markers did Cathy buy altogether?
4 pens and
7 markers |
Remaining amount |
| 2x4 |
3x4 |
| |
More markers |
Left |
| |
1x3 |
3x3 |
| 8 p |
3 p |
9 p |
Cost of 1 pen = 1 u
Cost of 1 marker = 4 u
Cost of 4 pens = 4 x 1 u = 4 u
Cost of 7 markers = 7 x 4 u = 28 u
Total cost of 4 pens and 7 markers
= 4 u + 28 u
= 32 u
8 p = 32 u
1 p = 32 ÷ 8 = 4 u
Amount that Cathy used to buy more markers
= 3 p
= 3 x 4 u
= 12 u
Number of more markers that Cathy bought
= 12 u ÷ 4 u
= 3
Total number of markers that Cathy bought
= 7 + 3
= 10
Answer(s): 10
