[tex] \frac{1}{7} \times (x - \frac{23}{10} ) = \frac{5}{14} \\ \frac{x}{7} - \frac{23}{70} = \frac{5}{14} \\ \frac{x}{7} = \frac{5}{14} + \frac{23}{70} \\ \frac{x}{7} = \frac{25 + 23}{70} \\ \frac{x}{7} = \frac{48}{70} \\ 70x = 336 \\ x = \frac{336}{70} \\ x = 4.8[/tex]
Răspunsul este d) 4.8
