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Sagot :

suspho9

Answer:

2x = 84°

Step-by-step explanation:

the sum of the interior angles of a triangle is 180°

so

180 = 2x + x + 54

180 = 3x + 54

180 - 54 = 3x

126 = 3x

x = 126 : 3

x = 42°

------------------

2x = 42 * 2

2x = 84°

----------------

check

2x + x + 54 = 180

3x + 54 = 180

3 * 42 + 54 = 180

126 + 54 = 180

180 = 180

the answer is good

semsee45

Answer:

84 Degrees

Step-by-step explanation:

Interior angles in a triangle sum to 180°

⇒ x + 2x + 54 = 180

⇒ 3x + 54 = 180

⇒ 3x = 180 - 54

⇒ 3x = 126

⇒ x = 126 ÷ 3

⇒ x = 42

Therefore:

⇒ 2x = 2(42)

         = 84°

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