9 1 4x 10 =- 2 July 8, 2019 16 32 64 128 9 1 4x10 235x254 1 10 4x 5x =- 9 2x X 2y =- 9 dan 1 4x 1 2y 10 4x 1 9 and 6x 2 10 9+10 = 11 1+9= 10