Evan and Emily had an equal number of chocolate bars at first. After Evan bought another 20 chocolate bars and Emily lost 12 chocolate bars, Evan had thrice as many chocolate bars as Emily. Find the number of chocolate bars each of them had at first.
| |
Evan |
Emily |
| Before |
3 u - 20 |
1 u + 12 |
| Change |
+ 20 |
- 12 |
| After |
3 u |
1 u |
The number of chocolate bars that Evan and Emily at first is the same.
3 u - 20 = 1 u + 12
3 u - 1 u = 12 + 20
2 u = 32
1 u = 32 ÷ 2 = 16
Number of chocolate bars that each of them had at first
= 1 u + 12
= 16 + 12
= 28
Answer(s): 28
