Question

Liam is setting up folding chairs for a meeting. If he arranges the chairs in 8 rows of the same length, he has 9 chairs left over. If he arranges the chairs in 6 rows of that same length, he has 21 left over. How many chairs does Liam have?

Answer 1

8x +9 = 6x + 21 where x = number of chairs in each row
2x=12
x=6

sub back into original equation 8 x 6 + 9 =57 chairs