Liam is setting up folding chairs for a meeting. if he arranges the chairs in 9 rows of the same length, he has 3 chairs left over. if he arranges the chairs in 7 rows of that same length, he has 19 left over. how many chairs does liam have?

He has 75 chairs
The x represents the amount of chairs in each row while the number attached to the exponent shows how many rows he was able to set up with the extra chairs
 9x + 3 = 7x + 19
-7x -3    -7x     -3

2x=16        x=8
2     2
Plug 8 back into the equation and you see that it equals 75 on both sides. So that means Liam has 75 chairs to set up