Jade had 4 times as many marbles as Dana at first. After Jade gave 15 marbles to Dana, they each had the same number of marbles in the end. How many marbles did Dana have in the end?
| |
Jade |
Dana |
| Before |
4 u |
1 u |
| Change |
- 15 |
+ 15 |
| After |
4 u - 15 |
1 u + 15 |
Comparing Jade and
Dana in the end |
1 |
1 |
The number of marbles that Jade and Dana had in the end is equal.
4 u - 15 = 1 u + 15
4 u - 1 u = 15 + 15
3 u = 30
1 u = 10
Number of marbles that Dana had in the end
= 1 u + 15
= 10 + 15
= 25
Answer(s): 25
