Julie had 20 more puffs than Xylia at first. After Julie ate 4 puffs, she had five times as many puffs as Xylia in the end. How many puffs did Xylia have?
| |
Xylia |
Julie |
| Before |
1 u |
1 u + 20 |
| Change |
|
- 4 |
| After |
1 u |
1 u + 16 |
Comparing Xylia
and Julie in the end |
1 u |
5 u |
The number of puffs that Xylia had remains unchanged.
Number of puffs that Julie had in the end
= 5 x 1 u
= 5 u
5 u = 1 u + 16
5 u - 1 u = 16
4 u = 16
1 u = 16 ÷ 4 = 4
Number of puffs that Xylia had
= 1 u
= 4
Answer(s): 4
