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Lena [83]
3 years ago
5

Please solve this question if you do you'll recieve the good 10 points

Mathematics
1 answer:
Ilia_Sergeevich [38]3 years ago
8 0

Answer:

  • 3

Step-by-step explanation:

<u>Ratio of corresponding sides of similar triangles are:</u>

  • AD/AB = DE/BC

<u>Substitute values</u>

  • (9+3)/3 = 12/x
  • 4 = 12/x
  • x = 12/4
  • x = 3
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