Paul and Jack share a bunch of starfruits in the ratio 9 : 7. If Paul gives Jack 10 starfruits from his share, they will have the same number of starfruits. How many starfruits does Paul have at first?
| |
Paul |
Jack |
| Before |
9 u |
7 u |
| Change |
- 10 |
+ 10 |
| After |
9 u - 10 |
7 u + 10 |
If Paul gives Jack 10 starfruits from his share, they will have the same number of starfruits.
9 u - 10 = 7 u + 10
9 u - 7 u = 10 + 10
2 u = 20
1 u = 20 ÷ 2 = 10
Number of starfruits that Paul has
= 9 u
= 9 x 10
= 90
Answer(s): 90
