Asher had
25 as many pens as Gwen. After Asher gave away 77 pens, he had 89 less pens than Gwen. How many pens did Gwen have?
| |
Asher |
Gwen |
| Before |
2 u |
5 u |
| Change |
- 77 |
|
| After |
2 u - 77 |
5 u |
Gwen had 89 more pens than Asher in the end. So, if Asher had another 89 pens, he would have the same number of pens as Gwen.
5 u = 2 u - 77 + 89
5 u - 2 u = 89 - 77
3 u = 12
1 u = 12 ÷ 3 = 4
Number of pens that Gwen had at first
= 5 u
= 5 x 4
= 20
Answer: 20
