10 2 5 x 15 July 8, 2019 16 32 64 128 Solve x 15 10 2 5 10 2 x )= 15 x 1 )+ 5 5 (- 2 15 )- x =- 3 10 10 1 2 x 5 3 4 x 15 10 19 x (- 2 150 (- 5 7 5 x )- 2 x 10 )= 15 5 x 6 )- 2 x 10 )= 15 10 5 x 3 15 6 2 5 x 16 10 chia 2 15 10×2 5 10 1/2 x 5
