7 x 7 x 7 x 7 = Zy
What is the value of Z and y?
8 x 8 = 8x
What is the value of x?
71 x 71 x 71 x 71 = 7(1+1+1+1) = 74 so z = 7 y = 4
8 x 8 = 82 so x = 2