Б)а+1/4=34 в)у-1/5=3/10 г)5/6-с=1/3

Б) а + 1/4 = 3/4;

а = 3/4 - 1/4;

а = 2/4 = 1/2.

Проверка:

1/2 + 1/4 = 3/4;

2/4 + 1/4 = 3/4;

3/4 = 3/4.

Ответ: а = 2/4 = 1/2.

в) у - 1/5 = 3/10;

у = 3/10 + 1/5;

у = 3/10 + 2/10;

у = 5/10 = 1/2.

Проверка:

1/2 - 1/5 = 3/10;

5/10 - 2/10 = 3/10;

3/10 = 3/10.

Ответ: у = 5/10 = 1/2.

г) 5/6 - с = 1/3;

с = 5/6 - 1/3;

с = 5/6 - 2/6;

с = 3/6 = 1/2.

Проверка:

5/6 - 1/2 = 1/3;

5/6 - 3/6 = 1/3;

2/6 = 1/3;

1/3 = 1/3.

Ответ: с = 3/6 = 1/2.