Yesterday, Mae had 58 local and foreign stamps. Today, she gave away
13 of her local stamps and 8 of her foreign stamps. Now, she has an equal number of local and foreign stamps. How many local stamps did she have yesterday?
|
Local stamps |
Foreign stamps |
Total |
Before |
3 u |
2 u + 8 |
58 |
Change |
- 1 u |
- 8 |
|
After |
2 u |
2 u |
|
Mae has an equal number of local and foreign stamps in the end.
Total number of stamps yesterday
= 3 u + 2 u + 8
= 5 u + 8
5 u + 8 = 58
5 u = 58 - 8
5 u = 50
1 u = 50 ÷ 5 = 10
Number of local stamps yesterday
= 3 u
= 3 x 10
= 30
Answer(s): 30