Jean had 51 cranberry and blueberry muffins. After giving away
13 of her cranberry muffins and 21 of her blueberry muffins, she had an equal number of cranberry and blueberry muffins. How many blueberry muffins did she have at first?
| |
Cranberry muffins |
Blueberry muffins |
Total |
| Before |
3 u |
2 u + 21 |
51 |
| Change |
- 1 u |
- 21 |
|
| After |
2 u |
2 u |
|
Fraction of the cranberry muffins left
= 1 -
13=
23 The number of cranberry and blueberry muffins in the end is the same.
Total number of muffins at first
= 3 u + 2 u + 21
= 5 u + 21
5 u + 21 = 51
5 u = 51 - 21
5 u = 30
1 u = 30 ÷ 5 = 6
Number of blueberry muffins at first
= 2 u + 21
= 2 x 6 + 21
= 12 + 21
= 33
Answer(s): 33
