Respuesta :
The 4th one and the last one:
12x -4y=18
3x - y= 9/2
y= 3x-9/2 so the slope is 3
3x-y=10
y=3x-10 so the slope is 3
12x -4y=18
3x - y= 9/2
y= 3x-9/2 so the slope is 3
3x-y=10
y=3x-10 so the slope is 3