There were some rows of chairs in a basketball court. Each row had 11 chairs. When Julie brought in 2 extra chairs and rearranged all the chairs, there were 4 chairs in each row and 4 more rows than before. How many chairs were there at first?
| |
First
arrangement |
Second
arrangement |
| Number |
1 u |
1 u + 4 |
| Value |
11 |
4 |
| Total value |
11 u |
4 u + 16 |
If another 2 chairs are added in the first arrangement, the total number of chairs in the first arrangement and the second arrangement will be the same.
11 u + 2 = 4 u + 16
11 u - 4 u = 16 - 2
7 u = 14
1 u = 14 ÷ 7 = 2
Number of chairs at first
= 11 u
= 11 x 2
= 22
Answer(s): 22
