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Supplementary angles add up to 180 degrees

You can solve for the supplementary angle first. You can solve for the other directly, but the math is a little more involved.

Let A be an angle

Start with the supplementary angle.

A + ??? = 180

The angle you want is 12 less than twice as big

A + (2A - 12) = 180

Solve for A:

3A - 12 = 180

3A = 192

A = 64

Remember A is the supplementary angle, so subtract the angle we solved for (A) from 180 to find the angle you want.

180 - 64 = 116

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Q: How do you get the answer 116 to the problem an angle is 12 degrees less than twice its supplement find the angle?
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