Marion spent
23 of her money on 12 files and 6 pencils. The cost of each pencil is 2 times the cost of each file. She bought some more files with
56 of her remaining money. How many files did Marion buy altogether?
12 files + 6 pencils |
Remaining amount |
Total amount |
2 p = 24 u |
1 p = 12 u |
3 p |
12 files |
6 pencils |
More files |
Left |
|
|
|
5 |
1 |
|
12 u |
12 u |
10 u |
|
|
Cost of 1 file = 1 u
Cost of 1 pencil = 2 u
Cost of 12 files = 12 x 1 u = 12 u
Cost of 6 pencils = 6 x 2 u = 12 u
Cost of 12 files + 6 pencils
= 12 u + 12 u
= 24 u
2 p = 24 u
1 p = 24 u ÷ 2 = 12 u
Amount of remaining money that Marion spent on buying more files
=
56 x 12 u
= 10 u
Number of files that Marion bought with
56 of her remaining money
= 10 u ÷ 1 u
= 10
Total number of files that Marion bought
= 12 + 10
= 22
Answer(s): 22