Fabian had
38 as many pens as Tammy. After Fabian bought another 45 pens, he had 20 less pens than Tammy. How many pens did Fabian have at first?
| |
Fabian |
Tammy |
| Before |
3 u |
8 u |
| Change |
+ 45 |
|
| After |
3 u + 45 |
8 u |
Tammy had 20 more pens than Fabian in the end. So, if Fabian had another 20 pens, he would have the same number of pens as Tammy.
8 u = 3 u + 45 + 20
8 u - 3 u = 45 + 20
5 u = 65
1 u = 65 ÷ 5 = 13
Number of pens that Fabian had at first
= 3 u
= 3 x 13
= 39
Answer: 39
