Bobby had
58 as many pens as Gwen. After Bobby gave away 15 pens, he had 69 less pens than Gwen. How many pens did Gwen have?
|
Bobby |
Gwen |
Before |
5 u |
8 u |
Change |
- 15 |
|
After |
5 u - 15 |
8 u |
Gwen had 69 more pens than Bobby in the end. So, if Bobby had another 69 pens, he would have the same number of pens as Gwen.
8 u = 5 u - 15 + 69
8 u - 5 u = 69 - 15
3 u = 54
1 u = 54 ÷ 3 = 18
Number of pens that Gwen had at first
= 8 u
= 8 x 18
= 144
Answer: 144