Question

If 2xº and (2x - 20) are a pair of adjacent supplementary angles, find thevalue of x.​

Answer 1

Answer:

x = 50

Step-by-step explanation:

Since the two angles are supplementary, add them together and set them equal to 180 degrees

2x + 2x - 20 = 180          Combine like terms

4x - 20 = 180

   + 20   + 20                 Add 20 to both sides

4x = 200                        Divide both sides by 4

x = 50

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