Find the value of n if the lines are perpendicular — task. Mathematics State Board, Class 10.

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If the straight lines

3 x - (n + 5) y - 1 = 0

and

7 x + 3 y + 1 = 0

are perpendicular, then find the value of \(n\).

Answer:

The value of \(n\) is .

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10. Find the value of n if the lines are perpendicular