Решите уравнение:
1) $\frac{x}{72} - \frac{13}{72} = \frac{29}{72}$;
2) $(\frac{29}{42} - a) - \frac{13}{42} = \frac{11}{42}$;
3) $\frac{15}{17} - (b - \frac{3}{17}) = \frac{6}{17}$;
4) $\frac{29}{43} - (m + \frac{13}{43}) = \frac{5}{43}$.
$\frac{x}{72} - \frac{13}{72} = \frac{29}{72}$
$\frac{x}{72} = \frac{29}{72} + \frac{13}{72}$
$\frac{x}{72} = \frac{42}{72}$
x = 42
$(\frac{29}{42} - a) - \frac{13}{42} = \frac{11}{42}$
$\frac{29}{42} - a - \frac{13}{42} = \frac{11}{42}$
$-a = \frac{11}{42} - \frac{29}{42} + \frac{13}{42}$
$-a = -\frac{5}{42}$
$a = \frac{5}{42}$
$\frac{15}{17} - (b - \frac{3}{17}) = \frac{6}{17}$
$\frac{15}{17} - b + \frac{3}{17} = \frac{6}{17}$
$-b = \frac{6}{17} - \frac{15}{17} - \frac{3}{17}$
$-b = -\frac{12}{17}$
$b = \frac{12}{17}$
$\frac{29}{43} - (m + \frac{13}{43}) = \frac{5}{43}$
$\frac{29}{43} - m - \frac{13}{43} = \frac{5}{43}$
$-m = \frac{5}{43} - \frac{29}{43} + \frac{13}{43}$
$-m = -\frac{11}{43}$
$m = \frac{11}{43}$
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