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Please help I don't understand!
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Please help I don't understand!

Please help I don't understand!-example-1
User Djeikyb
by
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1 Answer

8 votes

Answer:

9

Explanation:

Take the sides in proportion.

⇒
(AE)/(AD) =(AB)/(AC)

⇒
(12)/(12+8) =(x)/(15)

⇒
(12)/(20) =(x)/(15)

⇒
(3)/(5) =(x)/(15)

⇒
3 = (x)/(3)

⇒ x = 3 × 3

⇒ x = 9

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