Tina had 4 times as many erasers as Elyse at first. After Tina gave 39 erasers to Elyse, they each had the same number of erasers in the end. How many erasers did Tina have at first?
| |
Tina |
Elyse |
| Before |
4 u |
1 u |
| Change |
- 39 |
+ 39 |
| After |
4 u - 39 |
1 u + 39 |
Comparing Tina and
Elyse in the end |
1 |
1 |
The number of erasers that Tina and Elyse had in the end is equal.
4 u - 39 = 1 u + 39
4 u - 1 u = 39 + 39
3 u = 78
1 u = 26
Number of erasers that Tina had at first
= 4 u
= 4 x 26
= 104
Answer(s): 104
