3 8 x 9 12 July 8, 2019 16 32 64 128 X 3 )- 8 y 9 )= 129 9 x 8 3 4x 12 3 8 x 12 9 16 sanding belts 2 3 x 8 9 12 12 3 8 x 9 1 4 5 12 3 8 x 4 9 3 8 x 12 5 x 10 9 3 3 4 x 8 9 x 4 9 12 12 5 9 3 x 8 3 x 3 = 9 9 x 8 =