\[\frac{2x^{2} + 6}{13} = \frac{13x}{13}\ \ \ \ \ | \cdot 13\]
\[2x^{2} + 6 = 13x\]
\[2x^{2} - 13x + 6 = 0\]
\[D = 169 - 48 = 121\]
\[x_{1} = \frac{13 + 11}{4} = 12;\ \]
\[x_{2} = \frac{13 - 11}{4} = \frac{2}{4} = 0,5.\]
\[Ответ:x = 0,5;x = 12.\]