1). 2,43 - 21,11 ≥ - 1,57х + 2,89 2). - 1,74х + 2 ≤ 3, 26х - 8,11 3). 103 - 14х > 40 - 23x 509 - 51x ≥ 259 - x
/ - дробь 1) = 1.75x≥2,89-2,43+21.11. 1.75x≥21.57; x≥21.57÷ 1.57; x≥2157/100÷157/100; x≥2157/100×100/157; x≥2157/157; x≥13целых 116/157 2) = -1.74x-3.26x≤-8.11-2; -5x≤-10.11; x≤-10.11:-5 x≤1011/100:5 x≤1011/100× 1/5 x≤1011/500; x≤2 целых11/500 3)= -14x+23>40-103; 9x>-63 x>-63:9 x>-7 4) =-51x+x≥259-509; -51x≥-250 x≤-250:(-50) x≤5