If \(\begin{vmatrix}2x & 5\\8 & x\end{vmatrix}=\begin{vmatrix}6 & -2\\7 & 3\end{vmatrix}\), then the value of x is

-6 only 6 only -6 or 6 3

-6 or 6

2x2 - 40 = 18 + 14  ⇒ 2x2 = 72 ⇒ x2 = 36 ⇒ x = ±6