Eric and David share a bunch of oranges in the ratio 7 : 2. If Eric gives David 30 oranges from his share, they will have the same number of oranges. How many oranges does Eric have at first?
| |
Eric |
David |
| Before |
7 u |
2 u |
| Change |
- 30 |
+ 30 |
| After |
7 u - 30 |
2 u + 30 |
If Eric gives David 30 oranges from his share, they will have the same number of oranges.
7 u - 30 = 2 u + 30
7 u - 2 u = 30 + 30
5 u = 60
1 u = 60 ÷ 5 = 12
Number of oranges that Eric has
= 7 u
= 7 x 12
= 84
Answer(s): 84
