Barbara spent
35 of her money on 5 highlighters and 2 staplers. The cost of one stapler was twice the cost of one highlighter. She bought some more staplers with
13 of her remaining money. How many staplers did Barbara buy altogether?
5 highlighters and
2 staplers |
Remaining amount |
| 3x3 |
2x3 |
| |
More staplers |
Left |
| |
1x2 |
2x2 |
| 9 p |
2 p |
4 p |
Cost of 1 highlighter = 1 u
Cost of 1 stapler = 2 u
Cost of 5 highlighters = 5 x 1 u = 5 u
Cost of 2 staplers = 2 x 2 u = 4 u
Total cost of 5 highlighters and 2 staplers
= 5 u + 4 u
= 9 u
9 p = 9 u
1 p = 9 ÷ 9 = 1 u
Amount that Barbara used to buy more staplers
= 2 p
= 2 x 1 u
= 2 u
Number of more staplers that Barbara bought
= 2 u ÷ 2 u
= 1
Total number of staplers that Barbara bought
= 2 + 1
= 3
Answer(s): 3
