Odpowiedź:
[tex]amt = k / :at\\m = \frac{k}{at} \\\\\frac{x}{5} = \frac{a}{6} / * 5\\x = \frac{5a}{6} \\\\\frac{2x}{c} = \frac{d}{5} / *5\\d = \frac{10x}{c}[/tex]
