х+8*4/29=12 5*7/18 - (х-2*5/18) = 1*11/18

Решим заданные уравнения:

1) х + 8 4/29 = 12;

х = 12 - 8 4/29;

х = 12 - 8 - 4/29;

х = 4 - 4/29;

х = 3 + 1 - 4/29;

х = 3 + 29/29 - 4/29;

х = 3 + (29 - 4) / 29;

х = 3 + 25/29;

х = 3 25/29.

Ответ: х = 3 25/29.

2) 5 7/18 - (х - 2 5/18) = 1 11/18;

- (х - 2 5/18) = 1 11/18 - 5 7/18;

- (х - 2 5/18) = 1 - 5 + 11/18 - 7/18;

- (х - 2 5/18) = - 4 + (11 - 7) / 18;

- (х - 2 5/18) = - 4 + 4/18;

- (х - 2 5/18) = - (4 - 4/18);

-х + 2 5/18 = - 3 14/18;

-х = - 3 14/18 - 2 5/18;

-х = - (3 14/18 + 2 5/18);

-х = - (5 + 14/18 + 5/18);

-х = - (5 + 19/18);

-х = - (5 + 1 1/18);

-х = - 6 1/18;

х = 6 1/18.

Ответ: х = 6 1/18.