Hi Sarah,
The problem is to find a where . So you have 1 equation and two unknowns and this is a real problem! The only way I can see to solve it is to try some numbers. You suggested 144 i.e.
So and this is
I hope this helps
The rows of chairs in section A of an auditorium are arranged in a square with as many chairs in each row as the total number of rows. Section B is also arranged in a similar manner. If section A has 23 more chairs than section B, how many chairs are in section A?
It has to be 144 but why?