Решите уравнение 2 х=4/7 - 10z=2/5 3x=-1/3 - 5y = - 2 целых 1/2 - 1/3 х=4 4/5z=-20 1/4x=1/2 2/9y=0 - 2/7z=-2/7 2x=-1/3 1/8y=4 - 6u=2/3

1) 2 х = 4/7,

х = 4/7 : 2 = 4/7 * 1/2 = 4/14 = 2/7,

Ответ: х = 2/7,

2) - 10z = 2/5,

z = 2/5 : ( - 10) = - 2/5 * 1/10 = - 1/25,

Ответ: z = - 1/25.

3) 3x = - 1/3,

х = - 1/3 : 3 = - 1/3 * 1/3 = - 1/9,

Ответ: х = - 1/9,

4) - 5y = - 2 1/2,

у = (2 * 2 + 1) / 2 : 5 = 5/2 * 1/5 = 1/2,

Ответ: у = 1/2,

5) - 1/3 х = 4,

х = - 4 : 1/3 = - 4 * 3 = - 12,

Ответ: х = - 12,

6) 4/5z = - 20,

z = - 20 : 4/5 = - 20 * 5/4 = - 25,

Ответ: z = - 25.

7) 1/4x = 1/2.

x = 1/2 : 1/4 = 1/2 * 4/1 = 2,

Ответ: х = 2,

8) 2/9y = 0,

у = 0 : 2/9 = 0,

Ответ: у = 0,

9) - 2/7z = - 2/7,

z = 2/7 : 2/7 = 1,

Ответ: z = 1.

10) 2x = - 1/3.

x = - 1/3 : 2 = - 1/3 * 1/2 = - 1/6,

Ответ: х = - 1/6,

11) 1/8y = 4,

у = 4 : 1/8 = 4 * 8 = 32,

Ответ: у = 32,

12) - 6u = 2/3,

u = - 2/3 : 6 = - 2/3 * 1/6 = - 1/9,

Ответ: u = - 1/9.