Olivia had 80 cheese and vanilla muffins. After giving away
13 of her cheese muffins and 15 of her vanilla muffins, she had an equal number of cheese and vanilla muffins. How many vanilla muffins did she have at first?
| |
Cheese muffins |
Vanilla muffins |
Total |
| Before |
3 u |
2 u + 15 |
80 |
| Change |
- 1 u |
- 15 |
|
| After |
2 u |
2 u |
|
Fraction of the cheese muffins left
= 1 -
13=
23 The number of cheese and vanilla muffins in the end is the same.
Total number of muffins at first
= 3 u + 2 u + 15
= 5 u + 15
5 u + 15 = 80
5 u = 80 - 15
5 u = 65
1 u = 65 ÷ 5 = 13
Number of vanilla muffins at first
= 2 u + 15
= 2 x 13 + 15
= 26 + 15
= 41
Answer(s): 41
