Fanny spent
34 of her money on 13 pencils and 8 staplers. The cost of each stapler is 4 times the cost of each pencil. She bought some more pencils with
23 of her remaining money. How many pencils did Fanny buy altogether?
| 13 pencils + 8 staplers |
Remaining
amount |
Total
amount |
| 3 p = 45 u |
1 p = 15 u |
4 p |
13
pencils |
8
staplers |
More pencils |
Left |
|
| |
|
2 |
1 |
|
| 13 u |
32 u |
10 u |
|
|
Cost of 1 pencil = 1 u
Cost of 1 stapler = 4 u
Cost of 13 pencils = 13 x 1 u = 13 u
Cost of 8 staplers = 8 x 4 u = 32 u
Cost of 13 pencils + 8 staplers
= 13 u + 32 u
= 45 u
3 p = 45 u
1 p = 45 u ÷ 3 = 15 u
Amount of remaining money that Fanny spent on buying more pencils
=
23 x 15 u
= 10 u
Number of pencils that Fanny bought with
23 of her remaining money
= 10 u ÷ 1 u
= 10
Total number of pencils that Fanny bought
= 13 + 10
= 23
Answer(s): 23
