5 6 7 8 y 2 July 8, 2019 16 32 64 128 5 6 y )+ 7 8y 2 5 2y 7 )+ 8 y 6 )= 31 2 5 4 6 8 7 x y 5) (7 8 - y) / 6 1 = 0 2 5 6-7 8 7 6-8(-5 2)
