12 8 4 2x July 8, 2019 16 32 64 128 8 (- 2x 4 )+ 12 =- 52 12 2x 8 x 4 12 4 2x3 8 12 4 2x 9 )=- 8 x 3 12 2x 4 )= 8 24x 48 12 4 2x 9 )=- 8 4 - 2x 8 12 ) 2 12 4-2 8