5 15 x 2 10 July 8, 2019 16 32 64 128 Solve x 15 10 2 5 5 (- 2 15 )- x =- 3 10 15 5 6 x 10 2 5 7 5 x )- 2 x 10 )= 15 15 x 10 2 5.2 x 10 5 15 x 2 5 15 × 2 5
