А)1/8u-2=5/8u+1 Б)x/8-x/4+x/2-x=1 В)5x/9-2x/3-x=4 Г)3x/4-x=4x/5+x Д)6(x-1)-3(5-x)=9 Е) 4(3x-2)-4(x-2)=2 Ж)5(6+x)-5(2x+7)=0

Решение задачи:

А) 1/8u - 2 = 5/8u +1;

16u + 8u = 1 – 5;

24u = - 4;

u = - 1/6.

Б) х/8 – х/4 + х/2 – х = 1;

- 5х = 8;

х = - 8/5 = - 1 3/5.

В) 5х/9 – 2х/3 – х = 4;

5х – 6х – 9х = 36;

- 10х = 36;

х = - 36/10 = - 3 3/5.

Г) 3х/4 – х = 4х/5 + х;

15х – 20х = 16х  + 20х;

41х = 0;

х = 0.

Д) 6 (х – 1) – 3 (5 – х) = 9;

6х – 6 - 15 + 3х = 9;

9х = 30;

х = 30/9 = 3 1/3.

Е) 4 (3х – 2) – 4 (х -2) = 2;

12х - 8 – 4х + 8 = 2;

8х = 2;

х = 1/4.

Ж) 5 (6 + х) – 5 (2х + 7) = 0;

30 + 5х – 10х – 35 = 0;

- 5х = 5;

х = - 1.