## How to solve this D.E $y”(\frac{x}{2})+y'(\frac{x}{2})+y(x)=x$

I know how to slove $$y”(x)+y'(x)+y(x)=x$$

But I couldn’t solve this $$y”(\frac{x}{2})+y'(\frac{x}{2})+y(x)=x$$

any hint to help me? Thanls