2 (- x 1 ) 5x 4 =- 12 July 8, 2019 16 32 64 128 2 (- x 1 )+ 5x 4 =- 12 X 1 2 5x 12 3 4 3 x 2 )= 1 4 12x 4 )- 5x 2 − x 1 )+ 5x 4 − 12 solve for x 5 2x 1 )- 4 5x 2 )= 19 2 x 12 2 x 2 5
