Diana had 10 more puffs than Joelle at first. After Diana ate 4 puffs, she had thrice as many puffs as Joelle in the end. How many puffs did Joelle have?
| |
Joelle |
Diana |
| Before |
1 u |
1 u + 10 |
| Change |
|
- 4 |
| After |
1 u |
1 u + 6 |
Comparing Joelle
and Diana in the end |
1 u |
3 u |
The number of puffs that Joelle had remains unchanged.
Number of puffs that Diana had in the end
= 3 x 1 u
= 3 u
3 u = 1 u + 6
3 u - 1 u = 6
2 u = 6
1 u = 6 ÷ 2 = 3
Number of puffs that Joelle had
= 1 u
= 3
Answer(s): 3
