3 7 x 12 2 x 5 July 8, 2019 16 32 64 128 25 x 3 2 12 * 5 x 2 7 0 3 4 x 12 7 x 5 2 Tìm x 12 7 x 2 3 7 5 0 5 x 2 3 x 7 12 2 x 5 y 12 7 x 3 y 1 Tìm x 12 7 chia x 2 3 7 5 5 x 7 = 35 3 x-5=x+3 12 x 5 + 7
