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Llana [10]
3 years ago
12

P l e a s e h e l p (Only spaced it cus I needed 20 characters, danke)

Mathematics
2 answers:
lozanna [386]3 years ago
7 0

Answer:

63

Step-by-step explanation:

2y-18+y+9=180 degrees

3y-9=180 degrees

3y=189 degrees

y=63 degrees

GenaCL600 [577]3 years ago
3 0

Answer:

y = 63

Step-by-step explanation:

A straight line is equal to 180 degrees.

180 = 2y - 18 + y + 9

180 = 3y -9

189 = 3y

189/3

y = 63

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