4(14+4x)-3x=6x 6(3x+1)-3x=11x

$$\begin{aligned} &4(14+4x)-3x = 6x + 6(3x+1)-3x = 11x \\ &56 + 16x - 3x = 6x + 18x + 6 - 3x = 11x \\ &56 + 13x = 21x + 6 \\ &11x - 3x - 11x = 11x \\ &56 - 6 = 21x - 13x \\ &50 = 8x \\ &x = \frac{50}{8} = \frac{25}{4} = 6.25 \end{aligned}$$ Ответ: x = 6.25