1169. a) 5x - 39 при x = 10; 0; 3; b) x - 1/3 при x = 5; 2 1/2; -0,5; 6) -3,5x + 6 при x = 2; г) 1/2 - 2/3x при x = 0,5;

Решение:

1169. а)

1. При x = 10: $$5 imes 10 - 39 = 50 - 39 = 11$$
2. При x = 0: $$5 imes 0 - 39 = 0 - 39 = -39$$
3. При x = 3: $$5 imes 3 - 39 = 15 - 39 = -24$$

1169. б)

1. При x = 5: $$5 - rac{1}{3} = rac{15}{3} - rac{1}{3} = rac{14}{3} = 4rac{2}{3}$$
2. При $$x = 2rac{1}{2} = rac{5}{2}$$: $$rac{5}{2} - rac{1}{3} = rac{15}{6} - rac{2}{6} = rac{13}{6} = 2rac{1}{6}$$
3. При x = -0,5 = -rac{1}{2}: $$-rac{1}{2} - rac{1}{3} = -rac{3}{6} - rac{2}{6} = -rac{5}{6}$$

1169. б) (второе задание с буквой б)

1. При x = 2: $$-3,5 imes 2 + 6 = -7 + 6 = -1$$

1169. г)

1. При x = 0,5 = rac{1}{2}: $$rac{1}{2} - rac{2}{3} imes rac{1}{2} = rac{1}{2} - rac{1}{3} = rac{3}{6} - rac{2}{6} = rac{1}{6}$$