9.a) 7x-10+2x-14<8x-8 9x-24<8x-8 9x-8x<-8+24 x<16 b) 2x+10-12x+6>10x-15 -10x+16>10x-15 -10x-10x>-15-16 -20x>-31/×(-1) 20x>31 x>31:20 x>1,55 c) 6x+9+6x+4<9x+34 12x+13<9x+34 12x-9x<34-13 3x<21 x<21:3 x<7 d) 5x-15-2x+2+3x>sau egal-1+7x 6x-13>-1+7x 6x-7x>-1+13 -x>12/×(-1) x>-12 e) -3x+8-6x+12sau egal36-6x-12 0-6>24-6x -6+6x>24 6x>24+6 6x>30 x>30:6 x>5 -x>12/×(-1)