Find equation of the line perpendicular to the line *x *– 7*y *+ 5 = 0 and having *x *intercept 3.

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#### Solution

The given equation of line is *x *– 7*y *+ 5 = 0.

The equation of the line with slope –7 and *x*-intercept 3 is given by

*y* = *m* (*x* – *d*)

⇒ *y* = –7 (*x* – 3)

⇒ *y* = –7*x* + 21

⇒ 7*x* + *y* = 21

Concept: General Equation of a Line

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