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maw [93]
3 years ago
9

Hey can somebody please help me with this

Mathematics
1 answer:
ivann1987 [24]3 years ago
3 0

Answer:

x =4

Step-by-step explanation:

sum of angles in a triangle = 180

(equilateral triangle) all sides are equal

180 ÷ 3 = 60

10x+20 =60

10x = 60 - 20

10x = 40

10x ÷10 = 40÷ 10

x = 4

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