A1. The equation of the line passing through the point $A(\pi, 0)$ and the intersection of the lines $y=\pi-2 x$ and $y=\pi-\frac{x}{2}$ is:
(A) $y=2 x+\pi$
(B) $y=-x+\pi$
(C) $y=x-\pi$
(D) $y=2 \pi$
(E) none of the above
A1. The lines with equations $y=\pi-2 x$ and $y=\pi-\frac{x}{2}$ intersect at the point $B(0, \pi)$. The equation of the line through the points $A(\pi, 0)$ and $B(0, \pi)$ is $y=-x+\pi$.