Yen spent
27 of her money on 6 highlighters and 3 pens. The cost of one pen was twice the cost of one highlighter. She bought some more pens with
13 of her remaining money. How many pens did Yen buy altogether?
6 highlighters and
3 pens |
Remaining amount |
| 2x3 |
5x3 |
| |
More pens |
Left |
| |
1x5 |
2x5 |
| 6 p |
5 p |
10 p |
Cost of 1 highlighter = 1 u
Cost of 1 pen = 2 u
Cost of 6 highlighters = 6 x 1 u = 6 u
Cost of 3 pens = 3 x 2 u = 6 u
Total cost of 6 highlighters and 3 pens
= 6 u + 6 u
= 12 u
6 p = 12 u
1 p = 12 ÷ 6 = 2 u
Amount that Yen used to buy more pens
= 5 p
= 5 x 2 u
= 10 u
Number of more pens that Yen bought
= 10 u ÷ 2 u
= 5
Total number of pens that Yen bought
= 3 + 5
= 8
Answer(s): 8
