There were some rows of tables in a canteen. Each row had 8 tables. When Shiyun brought in 10 extra tables and rearranged all the tables, there were 5 tables in each row and 5 more rows than before. How many tables were there at first?
| |
First
arrangement |
Second
arrangement |
| Number |
1 u |
1 u + 5 |
| Value |
8 |
5 |
| Total value |
8 u |
5 u + 25 |
If another 10 tables are added in the first arrangement, the total number of tables in the first arrangement and the second arrangement will be the same.
8 u + 10 = 5 u + 25
8 u - 5 u = 25 - 10
3 u = 15
1 u = 15 ÷ 3 = 5
Number of tables at first
= 8 u
= 8 x 5
= 40
Answer(s): 40
