Liam and Gabby had the same number of chocolate bars. After Gabby gave away 21 chocolate bars and Liam gave away 51 chocolate bars, Gabby had 3 times as many chocolate bars as Liam. How many chocolate bars did each of them have at first?
| |
Liam |
Gabby |
| Before |
1 u + 51 |
3 u + 21 |
| Change |
- 51 |
- 21 |
| After |
1 u |
3 u |
The number of chocolate bars that Liam and Gabby had at first is the same.
3 u + 21 = 1 u + 51
3 u - 1 u = 51 - 21
2 u = 30
1 u = 30 ÷ 2 = 15
Number of chocolate bars that each of them had at first
= 1 u + 51
= 15 + 51
= 66
Answer(s): 66
