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In the figure, AOC is a line, find $x$."
Given:
AOC is a line.
To do:
We have to find the value of $x$.
Solution:
We know that,
Sum of the angles on a straight line is $180^o$.
Therefore,
From the figure,
$\angle AOB + \angle COB = 180^o$
$70^o + 2x^o = 180^o$
$2x = 180^o - 70^o$
$2x= 110^o$
$x = 55^o$
The value of $x$ is $55^o$.
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