Л) (5/8x - 1/5)•3/4=3/4Решите уровнение

(5/8 * x - 1/5) * 3/4 = 3/4; 

5/8 * х - 1/5 = 3/4 : 3/4; 

5/8 * х - 1/5 = 3/4 * 4/3; 

5/8 * х - 1/5 = (3 * 4) / (4 * 3); 

5/8 * х - 1/5 = 12/12; 

5/8 * х - 1/5 = 1; 

5/8 * х = 1 + 1/5; 

5/8 * х = 1 1/5; 

х = 1 1/5 : 5/8; 

х = 6/5 : 5/8; 

х = 6/5 * 8/5; 

х = (6 * 8) / (5 * 5);

х = 48/25; 

х = 1 23/25. 

Проверка: 

(5/8 * 1 23/25 - 1/5) * 3/4 = 3/4; 

(5/8 * 48/25 - 1/5) * 3/4 = 3/4; 

((5 * 48) / (8 * 25) - 1/5) * 3/4 = 3/4; 

(240/200 - 1/5) * 3/4 = 3/4; 

(6/5 - 1/5) * 3/4 = 3/4; 

5/5 * 3/4 = 3/4; 

1 * 3/4 = 3/4; 

3/4 = 3/4. Решение верно.