The line 4x + ky = 20 passes through the points A(8, -4) and B(b, 2b), where k and b are constants.
(a) Find the values of k and b.
(b) Find the coordinates of the mid-point AB
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If a+b+c=0 for all positions of the moving line `ax+by+c=0 , show that the line always passes throught a fixed point . Find the coordinates of that fixed point.
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