12 1 2 x 5 3 4 July 8, 2019 16 32 64 128 5x 12 2 x 1 )= 3 5 2x )+ 4x X 4 y 3 =- 1 12 x 2 5 4y 7 4 12 x 2 )+ 5 3 4x 1 )+ 3 9x8 12 5x12 x 1 2 3 4 5 12 5 x 1 4 12 5 x 1 2 12 5 × 4