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natali 33 [55]
3 years ago
10

Um help me please !!!

Mathematics
1 answer:
Aloiza [94]3 years ago
3 0

Answer:

x = 15

Step-by-step explanation:

we know that a straight line have 180 angle

mean the sum of all angle is 180 degree

54 + x + 111 = 180

x = 15

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