Ответ:

[tex]4 \frac{5}{14} - (x - 7 \frac{3}{14} ) = 2 \frac{9}{14} \\ \frac{61}{14} - x + \frac{101}{14} = \frac{37}{14} \\ 61 - 14x + 101 = 37 \\ 14x = 61 + 101 - 37 \\ 14x = 125 \\ x = \frac{125}{14} \\ x = 8 \frac{13}{14} [/tex]