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Let L1 : (x-1)/3 = (y-2)/1 = (z-3)/(-3) ...

Let `L_1 : (x-1)/3 = (y-2)/1 = (z-3)/(-3)` be a line and P : 4x + 3y + 5z = 50 be a plane. `L_2` is parallel to the line `L_1`. If a plane P containing both the lines `L_1` and `L_2` are given by the equation
14x - by+ 5z + d = 0 (b,d `in` R), then the value of (b-d) is equal to

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