A fruit stall had 5 times as many kiwis as mangosteens. After 4 kiwis were added, the number of kiwis became 20 more than the number of mangosteens. How many mangosteens were there at the fruit stall at first?
|
Kiwis |
Mangosteens |
Before |
5 u |
1 u |
Change |
+ 4 |
|
After |
5 u + 4 |
1 u |
If another 4 mangosteens are added, the number of kiwis and mangosteens will be the same.
5 u + 4 = 1 u + 20
5 u - 1 u = 20 - 4
4 u = 16
1 u = 16 ÷ 4 = 4
Number of mangosteens at the fruit stall at first
= 1 u
= 4
Answer(s): 4