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Question

Find the measure of an angle, if four times of its complement is 12o more than twice the difference between its supplement and complement.

A
36
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B
45
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C
42
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D
24
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Solution

The correct option is B 42
Two angles whose sum is 180o are said to be supplementary.
Two angles whose sum is 90o are said to be complementary.
Let the angle be x.
Given that 4(90x)=2[(180x)(90x)]+12
3604x=2×90+12
3604x=180+123604x=192
4x=360192
4x=168
x=1684
x=42
Therefore, the angle is 42o.

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