3 2x 9 ) 4 7 x )- 12 July 8, 2019 16 32 64 128 3 2x 9 )+ 4 7 x )- 12 3 2x 9 )- 4 3x 4 )= 2 x 12 )+ 3 7 3 x 3 = 9 12 - 3(2x + 7) = 2 - 9x 12 - 4(x - 3) = 39 - 9x D) 12 - 3(2x + 7) = 2 - 9x 12 3x - 4 9 = 2 3x + 9 6
