Question

Помогите пожалуйста.

Answer 1

б) 5 - (1(1/2) x +1/3)*6 = 2(1/3)x - 5(1/2)

5 - ((3/2) x +1/3)*6 = (7/3)x - 11/2;

5 - 9 x - 2 = (7/3)x - 11/2;

3 - 9 x = (7/3)x - 11/2; |· 6

18 - 54x = 14x - 33;

- 54x - 14x = - 33 - 18;

-68x = -51;

x = -51 : (-68) = 51/68 = 3/4 = 0.75

в) (16,2 - х) · 3,2 - 50,08 = -8,12 - 5,1х; |·5

(16,2 - х) · 16 - 250,4 = -40,6 - 25,5х; |·10

(162 - 10х) · 16 - 2504 = -406 - 255х;

2592 - 160х - 2504 = -406 - 255х;

- 160х + 255х = -406 + 2504 - 2592;

95x = -494;

x = -494:95 = -5(19/95) = -5(1/5) = -5.2