Marion bought four times as many muffins as Luis. After Marion ate 3 muffins, she had 12 more muffins than Luis. How many muffins did they buy altogether?
| |
Marion |
Luis |
Total |
| Before |
4 u |
1 u |
5 u |
| Change |
- 3 |
|
|
| After |
4 u - 3 |
1 u |
|
The number of muffins that Luis had remains unchanged.
If Luis had another 12 muffins in the end, the number of muffins that Marion and Luis had would be the same.
4 u - 3 = 1 u + 12
4 u - 1 u = 12 + 3
3 u = 15
1 u = 15 ÷ 3 = 5
Total number of muffins
= 4 u + 1 u
= 5 u
= 5 x 5
= 25
Answer(s): 25
