Решите уравнения номер 752 срочно

Решите задачу:

$1) \frac{x}{72} - \frac{13}{72} = \frac{29}{72} \\ x - 13 = 29 \\ x = 29 + 13 \\ x = 42$
$2) \frac{29}{42} - a = \frac{11}{42} + \frac{13}{42} = \frac{24}{42} \\ a = \frac{29}{42} - \frac{24}{42} = \frac{5}{42}$
$3)b - \frac{3}{17} = \frac{15}{17} - \frac{6}{17} = \frac{9}{17} \\ b = \frac{9}{17} + \frac{3}{17} = \frac{12}{17}$
$4)m + \frac{13}{43} = \frac{29}{43} - \frac{5}{43} = \frac{24}{43} \\ m = \frac{24}{43} - \frac{13}{43} = \frac{11}{43}$