Which of the following equations have infinitely many solutions?

Choose all answers that apply

10x - 10 = -10x - 10
10x - 10 = -10x + 10
-10x-10 = -10x -10
-10x-10= -10x+10

The equations that have infinitely many solutions are:

10x - 10 = -10x - 10
-10x-10 = -10x -10