Nora and Emma have some macarons each. If Nora gives Emma 29 macarons, Nora will have
25 as many macarons as Emma. If Nora gives Emma 3 macarons, they will have an equal number of macarons. How many macarons does Emma have at first?
|
Case 1 |
Case 2 |
|
Nora |
Emma |
Nora |
Emma |
Before |
2 u + 29 |
5 u - 29 |
3.5 u + 3 |
3.5 u - 3 |
Change |
- 29 |
+ 29 |
- 3 |
+ 3 |
After |
2 u |
5 u |
3.5 u |
3.5 u |
Total number of macarons that Nora and Emma have
= 2 u + 5 u
= 7 u
Number of macarons that Nora and Emma each has in the end is the same.
Number of macarons that Nora and Emma each has in the end in Case 2
= 7 u ÷ 2
= 3.5 u
Number of macarons that Nora had at first is the same in Case 1 and Case 2.
3.5 u + 3 = 2 u + 29
3.5 u - 2 u = 29 - 3
0.5 u = 26
1 u = 26 ÷ 0.5 = 52
Number of macarons that Emma has
= 5 u - 29
= 5 x 52 - 29
= 260 - 29
= 231
Answer(s): 231