The value of x in the equation 113 × 4 - x × 213 × 9 - 5 × 7 = 5 is?

Answer: Option A

$$\begin{array}{rl}& \frac{113\times 4-x\times 2}{13\times 9-5\times 7}=5\\ & \Rightarrow \frac{452-2x}{117-35}=5\\ & \Rightarrow \frac{452-2x}{82}=5\\ & \Rightarrow 452-2x=410\\ & \Rightarrow 2x=452-410=42\\ & \Rightarrow x=21\end{array}$$