PSLEThere were a total of 176 tables and benches in a tuckshop. There were 3 times as many benches as tables. After 12 benches and some tables were removed, there were 4 times as many benches as tables left. How many tables were removed from the tuckshop?
|
Tables |
Benches |
Total |
Before |
1 u |
3 u |
176 |
Change |
- ? |
- 12 |
|
After |
1 p |
4 p |
|
Total number of tables and benches
= 3 u + 1 u
= 4 u
4 u = 176
1 u = 176 ÷ 4 = 44
Number of benches at first
= 3 u
= 3 x 44
= 132
Number of benches left
= 132 - 12
= 120
4 p = 120
1 p = 120 ÷ 4 = 30
Number of tables removed from the tuckshop
= 44 - 30
= 14
Answer(s): 14