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muminat
3 years ago
10

Does anyone know this?

Mathematics
1 answer:
Vedmedyk [2.9K]3 years ago
6 0

Answer:

x = 8°

Step-by-step explanation:

(7 x + 1) + (3 x +9) = 90

10 x + 10 = 90

10 x = 80

x = 8°

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