Vanessa spent
37 of her money on 5 notebooks and 2 rulers. The cost of one ruler was twice the cost of one notebook. She bought some more rulers with
16 of her remaining money. How many rulers did Vanessa buy altogether?
5 notebooks and
2 rulers |
Remaining amount |
| 3x3 |
4x3 |
| |
More rulers |
Left |
| |
1x2 |
5x2 |
| 9 p |
2 p |
10 p |
Cost of 1 notebook = 1 u
Cost of 1 ruler = 2 u
Cost of 5 notebooks = 5 x 1 u = 5 u
Cost of 2 rulers = 2 x 2 u = 4 u
Total cost of 5 notebooks and 2 rulers
= 5 u + 4 u
= 9 u
9 p = 9 u
1 p = 9 ÷ 9 = 1 u
Amount that Vanessa used to buy more rulers
= 2 p
= 2 x 1 u
= 2 u
Number of more rulers that Vanessa bought
= 2 u ÷ 2 u
= 1
Total number of rulers that Vanessa bought
= 2 + 1
= 3
Answer(s): 3
