5 7 x 8 6 7 July 8, 2019 16 32 64 128 7 5 7 x 8 1 6 5 6 7 8 x 9 8 7 6 Tìm x biết 5 7 x 8 6 7 7 2x 5 )- 6 x 8 )= 7 7 x 6 y 71 5 x 8 y =- 23 5 x 7 = 35 5/7 x 8 5 + 6 x 7 + 8
