Tiffany and Hazel have some macarons each. If Tiffany gives Hazel 13 macarons, Tiffany will have
47 as many macarons as Hazel. If Tiffany gives Hazel 2 macarons, they will have an equal number of macarons. How many macarons does Hazel have at first?
|
Case 1 |
Case 2 |
|
Tiffany |
Hazel |
Tiffany |
Hazel |
Before |
4 u + 13 |
7 u - 13 |
5.5 u + 2 |
5.5 u - 2 |
Change |
- 13 |
+ 13 |
- 2 |
+ 2 |
After |
4 u |
7 u |
5.5 u |
5.5 u |
Total number of macarons that Tiffany and Hazel have
= 4 u + 7 u
= 11 u
Number of macarons that Tiffany and Hazel each has in the end is the same.
Number of macarons that Tiffany and Hazel each has in the end in Case 2
= 11 u ÷ 2
= 5.5 u
Number of macarons that Tiffany had at first is the same in Case 1 and Case 2.
5.5 u + 2 = 4 u + 13
5.5 u - 4 u = 13 - 2
0.5 u = 11
1 u = 11 ÷ 0.5 = 22
Number of macarons that Hazel has
= 7 u - 13
= 7 x 22 - 13
= 154 - 13
= 141
Answer(s): 141