Rachel and Zoe had the
same number of sweets at first. Rachel gave 21 sweets away to her sister. In the end, Zoe had four times as many sweets as Rachel. How many sweets did Rachel have at first?
| |
Rachel |
Zoe |
| Before |
4 u |
4 u |
| Change |
- 21 |
|
| After |
1 u |
4 u |
The number of sweets that Zoe had remains unchanged.
Number of sweets that Rachel gave away
= 4 u - 1 u
= 3 u
3 u = 21
1 u = 21 ÷ 3 = 7
Number of sweets that Rachel had at first
= 4 u
= 4 x 7
= 28
Answer(s): 28
