Esther spent
58 of her money on 2 highlighters and 9 files. The cost of one file was twice the cost of one highlighter. She bought some more files with
16 of her remaining money. How many files did Esther buy altogether?
2 highlighters and
9 files |
Remaining amount |
| 5x2 |
3x2 |
| |
More files |
Left |
| |
1x1 |
5x1 |
| 10 p |
1 p |
5 p |
Cost of 1 highlighter = 1 u
Cost of 1 file = 2 u
Cost of 2 highlighters = 2 x 1 u = 2 u
Cost of 9 files = 9 x 2 u = 18 u
Total cost of 2 highlighters and 9 files
= 2 u + 18 u
= 20 u
10 p = 20 u
1 p = 20 ÷ 10 = 2 u
Amount that Esther used to buy more files
= 1 p
= 1 x 2 u
= 2 u
Number of more files that Esther bought
= 2 u ÷ 2 u
= 1
Total number of files that Esther bought
= 9 + 1
= 10
Answer(s): 10
