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EastWind [94]
3 years ago
13

Help what is the value of x ?

Mathematics
1 answer:
Anuta_ua [19.1K]3 years ago
4 0

Answer:

141

Step-by-step explanation:

The interior angles of a polygon with <em>n</em> sides is 180(<em>n</em> - 2) and the polygon has 7 sides, so the sum of its interior angles is 180(7 - 2) = 180(5) = 900.

125 + (x + 7) + 107 + (x - 15) + x + 131 + 122 = 900

Combining like terms,

3x + 477 = 900

3x = 423

x = 141

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