Find the equation of a line parallel to x - axis and passing through the origin.

Equation of a line passing through (x_{1}, y_{1}, z_{1}) and parallel to a line with direction ratios a,b,c is

Since the line passes through origin i.e. (0,0,0)

x_{1} = 0, y_{1} = 0, z_{1} = 0

Since line is parallel to x - axis,

a = 1, b = 0, c = 0

Equation of Line is given by –

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