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