The angles of quadrilateral rae $x, x + 20, x + 30, x + 60$ Find $x$

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Solution

Angle sum of quadrilateral is $360$
The sum is $x + x + 20 + x + 30 + x + 60 = 360 4 x + 110 = 360 4 x = 250 x = \frac{125}{2}$

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