Oliver had
59 as many stamps as Winnie. After Oliver bought another 17 stamps, he had 19 less stamps than Winnie. How many stamps did Oliver have at first?
|
Oliver |
Winnie |
Before |
5 u |
9 u |
Change |
+ 17 |
|
After |
5 u + 17 |
9 u |
Winnie had 19 more stamps than Oliver in the end. So, if Oliver had another 19 stamps, he would have the same number of stamps as Winnie.
9 u = 5 u + 17 + 19
9 u - 5 u = 17 + 19
4 u = 36
1 u = 36 ÷ 4 = 9
Number of stamps that Oliver had at first
= 5 u
= 5 x 9
= 45
Answer: 45