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Scorpion4ik [409]
3 years ago
7

I NEED HELP PLEASE PLEASE

Mathematics
1 answer:
Svetlanka [38]3 years ago
4 0

9514 1404 393

Answer:

  y = 12

Step-by-step explanation:

Triangles ABD and CBD are congruent, so DA = DC:

  3y +6 = 5y -18

  24 = 2y . . . . . . . . add 18-3y; next, divide by 2

  12 = y

_____

<em>Additional comment</em>

In some variations of this question, you may be asked to solve for x. Since the angles are equal, you have ...

  3x -1 = 34 -2x  ⇒  5x = 35  ⇒  x = 7 . . . (consistent with ∠ABC = 40°)

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