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If 2a^2 - 7ab -ac +3b^2-2bc-c^2=0 then t...

If `2a^2 - 7ab -ac +3b^2-2bc-c^2=0` then the family of lines `ax + by + c=0` are either concurrent at the point `P(x_1,y_1)` or at the point `Q(x_2, y_2)`. Find the distance of the origin from the line passing through the points P and Q, the distance being measured parallel to the line `3x-4y=2`.

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