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