The angles of triangle are $(x + 10^{o}), (2 x - 30^{o})$ and $x^{o}$ . Find the value of $x$ ?

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Solution

The $x + 10, 2 x - 30, x$ are angles of triangle
By angle sum property
Sum of all angles is $180$
$x + 10 + 2 x - 30 + x = 180 4 x - 20 = 180 4 x = 180 + 20 4 x = 200 x = \frac{200}{4} x = 50$

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