Gabby spent
45 of her money on 11 staplers and 7 markers. The cost of each marker is 3 times the cost of each stapler. She bought some more staplers with
78 of her remaining money. How many staplers did Gabby buy altogether?
| 11 staplers + 7 markers |
Remaining
amount |
Total
amount |
| 4 p = 32 u |
1 p = 8 u |
5 p |
11
staplers |
7
markers |
More staplers |
Left |
|
| |
|
7 |
1 |
|
| 11 u |
21 u |
7 u |
|
|
Cost of 1 stapler = 1 u
Cost of 1 marker = 3 u
Cost of 11 staplers = 11 x 1 u = 11 u
Cost of 7 markers = 7 x 3 u = 21 u
Cost of 11 staplers + 7 markers
= 11 u + 21 u
= 32 u
4 p = 32 u
1 p = 32 u ÷ 4 = 8 u
Amount of remaining money that Gabby spent on buying more staplers
=
78 x 8 u
= 7 u
Number of staplers that Gabby bought with
78 of her remaining money
= 7 u ÷ 1 u
= 7
Total number of staplers that Gabby bought
= 11 + 7
= 18
Answer(s): 18
