\"\"

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Given that \"\".

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Since \"\" are corresponding angles.

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Since the line l parallel to m so their corresponding angles must be congruent.So, \"\"

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\"\"      (Definition of congruent angles)

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\"\"                 (Subtract 5x from each side)

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\"\"                       (Subtract 9 from each side)

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\"\"                           (Divide each side by 9)\"\"

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The value of x is 9.