Răspuns :

[tex] \frac{7}{8} - c + \frac{1}{8} = \frac{2}{8} \\ \\ \frac{7}{8} + \frac{1}{8} - \frac{2}{8} = c \\ \\ \frac{7 + 1 - 2}{8} = c \\ \\ \frac{6}{8} = c[/tex]

…ᘛ⁐̤ᕐᐷฅ^•ﻌ•^ฅ