A fruit stall had 4 times as many pears as dragonfruits. After 4 pears were added, the number of pears became 25 more than the number of dragonfruits. How many dragonfruits were there at the fruit stall at first?
| |
Pears |
Dragonfruits |
| Before |
4 u |
1 u |
| Change |
+ 4 |
|
| After |
4 u + 4 |
1 u |
If another 4 dragonfruits are added, the number of pears and dragonfruits will be the same.
4 u + 4 = 1 u + 25
4 u - 1 u = 25 - 4
3 u = 21
1 u = 21 ÷ 3 = 7
Number of dragonfruits at the fruit stall at first
= 1 u
= 7
Answer(s): 7
