There were some rows of tables in a hall. Each row had 11 tables. When Mary brought in 2 extra tables and rearranged all the tables, there were 6 tables in each row and 2 more rows than before. How many tables were there at first?
|
First arrangement |
Second arrangement |
Number |
1 u |
1 u + 2 |
Value |
11 |
6 |
Total value |
11 u |
6 u + 12 |
If another 2 tables are added in the first arrangement, the total number of tables in the first arrangement and the second arrangement will be the same.
11 u + 2 = 6 u + 12
11 u - 6 u = 12 - 2
5 u = 10
1 u = 10 ÷ 5 = 2
Number of tables at first
= 11 u
= 11 x 2
= 22
Answer(s): 22