Hue is arranging chairs. She can form 2 rows of a given length with 1 chair left over, or 8 rows of that same length if she gets 11 more chairs. How many chairs are in each row?
This isn't the same question, but it will help you!
Let the row length = L
We have this equation
Since the number of chairs she has is the same we have
2L + 1 = 8 L -11 add 11 to both sides, subtract 2L from both sides
12 = 6L divide both sides by 6
2 = L