rozwiac nierownosc: a) 6.5 - 9x > 0.5(x+1) b) 0.2(x+2) < 4.4 - x c) 0.5x > 2(0.1x + 0.25) d) -0.08(10x+5) ≤ 0.1 (x-20) + 0.4 e) 0.1x+ 0.01 ≥ 2( 0.01x + 0.02) f) 5(0.16x - 0.01) < 0.2 (1-x)

a) 6.5 - 9x > 0.5(x+1) zamiana na ulamki 65/10 -9x >5/10x +5/10 /*10 (obustronnie mnożysz przez 10) 65-90x>5x+5 -90x-5x>5-65 -95x>60 /:(-95) x<-60/95 x< -12-19 b) 0.2(x+2) < 4.4 - x 2/10 x +4/10<44/10 -x /*10 2x+4<44-10x 2x+10x<44-4 12x<40 /:12 x<40/12 x<10/3 x<3 1/3 c) 0.5x > 2(0.1x + 0.25) 5/10 x>2(1/10 x +25/100) 5/10 x >2/10 x +50/100 (przy 50/100 zera sie skroca) 5/10x-2/10x>5/10 /*10 5x-2x>5 3x>5 /:3 x>5/3 x>1 2/3 d) -0.08(10x+5) ≤ 0.1 (x-20) + 0.4 -8/100(10x+5)≤1/10(x-20)+4/10 -8/100*10x+8/100 *5≤1/10x-20*1/10+4/10 -8/10x+4/10≤1/10x-2+4/10 /*10 -8x+4≤x-20+4 -8x-x≤-4-20+4 -9x≤-20 /: (-9) x≥20/9 e) 0.1x+ 0.01 ≥ 2( 0.01x + 0.02) 1/10x+1/100 ≥2(1/100x+2/100) 1/10x+1/100 ≥2/100x+4/100 /*100 10x+1 ≥2x+4 10x-2x ≥4-1 8x ≥3 /:8 x ≥3/8 f) 5(0.16x - 0.01) < 0.2 (1-x) 5(16/100x-1/100)<2/10(1-x) 80/100x-5/100<2/10-2/10x /*10 8x-50/100<2-2x 8x-0,5<2-2x 8x+2x<2+0,5 10x<2,5 /*10 x<25 prosze o naj troche sie nameczylam;)