Olivia spent
38 of her money on 8 rulers and 10 highlighters. The cost of one highlighter was four times the cost of one ruler. She bought some more highlighters with
14 of her remaining money. How many highlighters did Olivia buy altogether?
8 rulers and
10 highlighters |
Remaining amount |
| 3x4 |
5x4 |
| |
More highlighters |
Left |
| |
1x5 |
3x5 |
| 12 p |
5 p |
15 p |
Cost of 1 ruler = 1 u
Cost of 1 highlighter = 4 u
Cost of 8 rulers = 8 x 1 u = 8 u
Cost of 10 highlighters = 10 x 4 u = 40 u
Total cost of 8 rulers and 10 highlighters
= 8 u + 40 u
= 48 u
12 p = 48 u
1 p = 48 ÷ 12 = 4 u
Amount that Olivia used to buy more highlighters
= 5 p
= 5 x 4 u
= 20 u
Number of more highlighters that Olivia bought
= 20 u ÷ 4 u
= 5
Total number of highlighters that Olivia bought
= 10 + 5
= 15
Answer(s): 15
