Rachel and Gem had an equal number of marbles at first. After Rachel gave 10 marbles to Gem, Gem had 25 marbles. How many marbles does Rachel have in the end?
| |
Rachel |
Gem |
| Before |
1 u |
1 u |
| Change |
- 10 |
+ 10 |
| After |
1 u - 10 |
25 |
Number of marbles that Gem had at first
= 25 - 10
= 15
1 u = 15
Number of marbles that Rachel had at first = 15
Number of marbles that Rachel had in the end
= 1 u - 10
= 15 - 10
= 5
Answer(s): 5
