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24-05-2021
Mathematics

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Respuesta :

24-05-2021

Answer:

[tex] \displaystyle A .20[/tex]

Step-by-step explanation:

By tangent theorem we acquire:

[tex] \displaystyle x + 10 = 9 + 21[/tex]

simplify addition:

[tex] \displaystyle x + 10 = 30[/tex]

cancel 10 from both sides:

[tex] \displaystyle x = 20[/tex]

hence,

our answer is A

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