Liam is setting up folding chairs for a meeting. If he arranges the chairs in 4 rows of the same length, he has 3 chairs left over. If he arranges the chairs in 2 rows of that same length, he has 19 left over. How many chairs does Liam have?

75 chairs

Step-by-step explanation:

1. 9x+3 : write equation

2. 7x+19 : write equation

3. 9x+3=7x+19 : make both equations equal to each other

4. 2x+3=19 : subtract 7x from both sides

5. 2x=16 : subtract 3 from both sides

6. 8 : divide 2 on both sides of the equal sign

7. 9 (8) + 3=75 : plug 8 into the equation