\[ \frac{2x+1}{3} = \frac{2+3x}{4} \]
\[ 12 \cdot \frac{2x+1}{3} = 12 \cdot \frac{2+3x}{4} \]
\[ 4(2x+1) = 3(2+3x) \]
\[ 8x + 4 = 6 + 9x \]
\[ 4 - 6 = 9x - 8x \]
\[ -2 = x \]
Ответ: x = -2.