Question

Помогите плииз срочно.
$( \frac{12}{13} + x) - \frac{5}{13} = \frac{9}{13}$
$\frac{12}{13} + x - \frac{5}{13} = \frac{9}{13}$
$( \frac{x}{72 } - \frac{13}{72} ) = \frac{29}{72}$
$\frac{15}{17} - (b - \frac{3}{17} ) = \frac{6}{17}$

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Answer 1

1) 44/65

2) 2/13

3) 42

4) 12/17