6) 1,6(x – 2) + 3,4 = 0,7(4 + x)

Решим уравнение: \begin{align*} 1.6(x - 2) + 3.4 &= 0.7(4 + x) \\ 1.6x - 3.2 + 3.4 &= 2.8 + 0.7x \\ 1.6x + 0.2 &= 2.8 + 0.7x \\ 1.6x - 0.7x &= 2.8 - 0.2 \\ 0.9x &= 2.6 \\ x &= \frac{2.6}{0.9} \\ x &= \frac{26}{9} \end{align*} Ответ: x = 26/9