Risa had 17 more sweets than Vaidev at first. After Vaidev had eaten 13 of his sweets, Risa had 4 times as many sweets as Vaidev. How many sweets did Risa and Vaidev have in total at first?
| |
Risa |
Vaidev |
Total |
| Before |
1 u + 13 + 17 |
1 u + 13 |
5 u + 13 |
| Change |
|
- 13 |
|
| After |
4 u |
1 u |
|
The number of sweets that Risa had at first remains unchanged.
4 u = 1 u + 13 + 17
4 u - 1 u = 30
3 u = 30
1 u = 30 ÷ 3 = 10
Number of sweets that they had at first
= 5 u + 13
= 5 x 10 + 13
= 50 + 13
= 63
Answer(s): 63
