which equation has infinitely man solutions

8x+3/2= 4x+5

6x+5/4=2x+2

12x+32/4=3x+8

8x-5/2=2x-6

The equation 6x+5/4=2x+2 has infinitely many solutions since if we subtract 2x from both sides and multiply through by 4, we get 4x=-3 and we can substitute any value for x in the equation.