Esther had 4 times as many stamps as Natalie at first. After Esther gave 30 stamps to Natalie, they each had the same number of stamps in the end. How many stamps did Esther have at first?
| |
Esther |
Natalie |
| Before |
4 u |
1 u |
| Change |
- 30 |
+ 30 |
| After |
4 u - 30 |
1 u + 30 |
Comparing Esther and
Natalie in the end |
1 |
1 |
The number of stamps that Esther and Natalie had in the end is equal.
4 u - 30 = 1 u + 30
4 u - 1 u = 30 + 30
3 u = 60
1 u = 20
Number of stamps that Esther had at first
= 4 u
= 4 x 20
= 80
Answer(s): 80
