18 3x 4 left x 2 right ) 6 July 8, 2019 16 32 64 128 18 3x 4 left x 2 right )+ 6 3 left( 1 - x right) + 5 left( x + 2 right) = 1 - 4x 3 left(x-4 right)=18+2x-11
