3 5x 8 2 x 7 July 8, 2019 16 32 64 128 3 5x 8 )=- 2 (- x 7 )- 12x 2 5x 8 1 3 x 7 3 8 5x 2 2x 7x 4 3 5x 2 )- 8 2x 7 )= 9 3 5x 8 1 2x 7 X 2 5x 8 )( x 3 7x 9 2 3 5x )+ 8 7 x )+ 4 x 1 5x 8 3 ≥ 4x 7 2 x ∈ r 5x 3 7x 8 )+( 2x 3 5x 2 x 5 x 7 = 35 3 x-5=x+3