Ken had
35 as many pens as Diana. After Ken bought another 27 pens, he had 11 less pens than Diana. How many pens did Ken have at first?
|
Ken |
Diana |
Before |
3 u |
5 u |
Change |
+ 27 |
|
After |
3 u + 27 |
5 u |
Diana had 11 more pens than Ken in the end. So, if Ken had another 11 pens, he would have the same number of pens as Diana.
5 u = 3 u + 27 + 11
5 u - 3 u = 27 + 11
2 u = 38
1 u = 38 ÷ 2 = 19
Number of pens that Ken had at first
= 3 u
= 3 x 19
= 57
Answer: 57