a) x ≥ -3
б) x < -9
в) 6x - 14 - 5x ≤ 3x - 12 => x - 14 ≤ 3x - 12 => -2 ≤ 2x => x ≥ -1
г) x - (2x-6)/8 + (x+1)/8 > 2 => 8x - 2x + 6 + x + 1 > 16 => 7x + 7 > 16 => 7x > 9 => x > 9/7