Esther had 17 more sweets than Billy at first. After Billy had eaten 19 of his sweets, Esther had 4 times as many sweets as Billy. How many sweets did Esther and Billy have in total at first?
| |
Esther |
Billy |
Total |
| Before |
1 u + 19 + 17 |
1 u + 19 |
5 u + 19 |
| Change |
|
- 19 |
|
| After |
4 u |
1 u |
|
The number of sweets that Esther had at first remains unchanged.
4 u = 1 u + 19 + 17
4 u - 1 u = 36
3 u = 36
1 u = 36 ÷ 3 = 12
Number of sweets that they had at first
= 5 u + 19
= 5 x 12 + 19
= 60 + 19
= 79
Answer(s): 79
