It will be D. Neither, because when you plug in 5 for x and 4 for y, the left side will equal 0, while the right side equals 7(5-6) = 7(-1) = -7, which does not equal 0 on the left side. If you use 6 for x and 5 for y, the left side will be 1 (5-4) and the right side will equal 0, 7(6-6) = 7(0) = 0, which does not equal to 1