3 years ago

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 n sides is 180(n - 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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