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HyperXKid

Answer: it is 4

Step-by-step explanation:

Answer:

Opposite sides of the parallelogram are congruent

  • [tex]3x+4=16[/tex]
  • [tex]3x=16-4[/tex]
  • [tex]3x=12[/tex]
  • [tex]x=12/3[/tex]
  • [tex]x=4[/tex]

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