Last week, Ken had a total of 230 grey and silver notebooks. Two weeks later, he sold
23 of all the grey notebooks and 26 silver notebooks. Now he has the same number of grey and silver notebooks. How many notebooks does he have in the end?
| |
Grey |
Silver |
Total |
| Before |
3 u |
1 u + 26 |
4 u + 26 |
| Change |
- 2 u |
- 26 |
|
| After |
1 u |
1 u |
|
Comparing the grey
and silver notebooks in the end |
1 |
1 |
|
Total number of notebooks at first
= 3 u + 1 u + 26
= 4 u + 26
4 u + 26 = 230
4 u = 230 - 26
4 u = 204
1 u = 204 ÷ 4 = 51
Number of notebooks that he has in the end
= 1 u + 1 u
= 2 u
= 2 x 51
= 102
Answer(s): 102
