1
Question
If the angles (2x − 10)° and (x − 5)° are complementary angles, find x.
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Solution
It is given that
and 
are complementary angles.
Therefore, their sum must be equal to 90°.
Thus,
Hence the value of x is
.
It is given that and are complementary angles.
Therefore, their sum must be equal to 90°.
Thus,
Hence the value of x is.
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