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Show that the lines (x-a+d)/(alpha-de...

Show that the lines `(x-a+d)/(alpha-delta)=(y-a)/alpha=(z-a-d)/(alpha+delta)` and `(x-b+c)/(beta-gamma)=(y-b)/beta=(z-b-c)/(beta+gamma)` are coplanar.

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`The correct option is B x -2y + z =0`
`The lines will be coplanar
∣ ∣ ∣ ∣ `a − ...
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