Fabian and Ian had a total of 173 pens at first. After Fabian bought 20 more pens and Ian gave away 15 pens, Fabian now has the same number of pens as Ian. How many pens did Fabian have at first?
| |
Fabian |
Ian |
Total |
| Before |
1 u - 20 |
1 u + 15 |
173 |
| Change |
+ 20 |
- 15 |
|
| After |
1 u |
1 u |
178 |
Total number of pens in the end
= 173 + 20 - 15
= 178
2 u = 178
1 u = 178 ÷ 2 = 89
Number of pens that Fabian had in the end
= 1 u
= 89
Number of pens that Fabian had at first
= 89 - 20
= 69
Answer(s): 69
