53. Решите уравнение: 1) x − 7 1/3 = 12 5/12; 2) (5 7/9 − x) + 2 3/4 = 3 5/12.

1. \(x=12\frac{5}{12}+7\frac{1}{3}=19+\frac{5}{12}+\frac{4}{12}=19\frac{3}{4}\).
2. \(5\frac{7}{9}-x=3\frac{5}{12}-2\frac{3}{4}=\frac{41}{12}-\frac{33}{12}=\frac{2}{3}\). Поэтому \(x=5\frac{7}{9}-\frac{2}{3}=5\frac{7}{9}-\frac{6}{9}=5\frac{1}{9}\).

Ответ: 1) \(x=19\frac{3}{4}\); 2) \(x=5\frac{1}{9}\).