There were some pencils in Box S and Box T. After Lee transferred
35 of the pencils from Box S to Box T, the ratio of the number of pencils in Box S to that in Box T changed to 1 : 7. Find the ratio of the numbers of pencils in Box S to the number of pencils in Box T at first.
|
Box S |
Box T |
Before |
5x1 = 5 u |
11 u |
Change |
- 3x1 = - 3 u |
+ 3 u |
After |
2x1 = 2 u |
|
Comparing Box S and Box T in the end |
1x2 = 2 u |
7x2 = 14 u |
The number of pencils in Box S in the end is repeated. Make the number of pencils in Box S in the end the same. LCM of 2 and 1 is 2.
At first
Box S : Box T
5 : 11
Answer(s): 5 : 11