12 (- 3 x 2 8 2 x (- 4 July 8, 2019 16 32 64 128 4 / 3 x + 2y = 8 2x + 3y = 12 4 upon 3 x 2 y 8 2 x 3 y 12 3 x 4 2 x 3 8 x 2 7x 12 4 3 x 2 y barabar 8 2 x 3 y barabar 12 X 2 8 x 4 7 2x 3 12 11 2 12 2 x 4 3 (12 - 2 4x)/8 = (3 8x - 19)/4 12 x 8 / 2