Question

Which system of equations has an infinite number of solutions?

2x – 6y = 18
x – y = 9
2x – 6y = 18
x + 3y = 9
2x – 6y = 18
x – 3y = 9

Answer 1

I think it's x - y = 9

Explanation:

It's the only without a variable with it. Hope this helps :)