The dog's reflection on the water's surface is because of light rays reflecting off the dog and onto the water to create a mirror image.
-3x + 3(2x - 6) = 6
-3x +6x - 18 = 6
3x - 18 = 6
3x = 6 + 18
3x = 24
x = 8
hope this helped, blessing! :)
I believe it would be the biosphere hoped this helped!