Mathematics

The angle which is one fifth of its supplement is:


ANSWER

$$30^o$$


SOLUTION
Let angle be $$x$$ and Supplement angle be $$180 - x $$
$$x = \dfrac{1}{5} \times (180-x)$$ 
$$5x = (180-x)$$
$$6x = 180$$
$$x = 30 $$.
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