There were some erasers in Box S and Box T. After Wesley transferred
23 of the erasers from Box S to Box T, the ratio of the number of erasers in Box S to that in Box T changed to 2 : 5. Find the ratio of the numbers of erasers in Box T to the number of erasers in Box S at first.
|
Box S |
Box T |
Before |
3x2 = 6 u |
1 u |
Change |
- 2x2 = - 4 u |
+ 4 u |
After |
1x2 = 2 u |
|
Comparing Box S and Box T in the end |
2x1 = 2 u |
5x1 = 5 u |
The number of erasers in Box S in the end is repeated. Make the number of erasers in Box S in the end the same. LCM of 1 and 2 is 2.
At first
Box T : Box S
1: 6
Answer(s): 1: 6