Opal had 55 cherry and blueberry muffins. After giving away
18 of her cherry muffins and 10 of her blueberry muffins, she had an equal number of cherry and blueberry muffins. How many blueberry muffins did she have at first?
| |
Cherry muffins |
Blueberry muffins |
Total |
| Before |
8 u |
7 u + 10 |
55 |
| Change |
- 1 u |
- 10 |
|
| After |
7 u |
7 u |
|
Fraction of the cherry muffins left
= 1 -
18=
78 The number of cherry and blueberry muffins in the end is the same.
Total number of muffins at first
= 8 u + 7 u + 10
= 15 u + 10
15 u + 10 = 55
15 u = 55 - 10
15 u = 45
1 u = 45 ÷ 15 = 3
Number of blueberry muffins at first
= 7 u + 10
= 7 x 3 + 10
= 21 + 10
= 31
Answer(s): 31
