Kylie had 15 more muffins than Yoko at first. After Kylie ate 5 muffins, she had thrice as many muffins as Yoko in the end. How many muffins did Yoko have?
| |
Yoko |
Kylie |
| Before |
1 u |
1 u + 15 |
| Change |
|
- 5 |
| After |
1 u |
1 u + 10 |
Comparing Yoko
and Kylie in the end |
1 u |
3 u |
The number of muffins that Yoko had remains unchanged.
Number of muffins that Kylie had in the end
= 3 x 1 u
= 3 u
3 u = 1 u + 10
3 u - 1 u = 10
2 u = 10
1 u = 10 ÷ 2 = 5
Number of muffins that Yoko had
= 1 u
= 5
Answer(s): 5
