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Ghella [55]
3 years ago
12

Iiiiiiiiytffhjhffjdjhdhdhdhdhhdhdd

Mathematics
1 answer:
SVEN [57.7K]3 years ago
8 0

Answer:

x = 30

Step-by-step explanation:

The sum of the 3 interior angles of a triangle = 180°, hence

x + x + 10 + 3x + 20 = 180

5x + 30 = 180 ( subtract 30 from both sides )

5x = 150 ( divide both sides by 5 )

x = 30

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