Tính 5 12 3 8 x 4 9 July 8, 2019 16 32 64 128 80 - x = 9 * 5 12 + x = 5 * 8 x - 32/4 = 50 x + 2 * 6 = 94 5 + 9 = 14 – 12 5 · · 4 · ( - 5 ) · ( - 1 ) 12 5+8 5
