Usha and Betty had an equal number of lollipops. After Usha bought another 25 lollipops and Betty bought another 7 lollipops, Usha had thrice as many lollipops as Betty. Find the number of lollipops that each of them had at first.
| |
Usha |
Betty |
| Before |
3 u - 25 |
1 u - 7 |
| Change |
+ 25 |
+ 7 |
| After |
3 u |
1 u |
The number of lollipops that Usha and Betty had at first is the same.
3 u - 25 = 1 u - 7
3 u - 1 u = 25 - 7
2 u = 18
1 u = 18 ÷ 2 = 9
Number of lollipops that each had at first
= 9 - 7
= 2
Answer(s): 2
