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Given the following angles of a regular polygon, 120°, (3x+5)°, (x)°, 45°, 135°, (x-45)°, and (5x)°, what is the value of x?

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the sum of the angles of an n-sided polygon is 180(n-2). So your angles must add up to 180*5 = 900°

So add 'em up and solve for x.
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