Question

The angles below are supplementary. What is the value of x? (5 points)

A pair of supplementary angles is shown. One angle measures 3x + 40, and the other angle measures 80.
Answer options:
16.6
20
26.7
40

Answer 1

Like the person said above me the answer would be x=20 because 3x=60 just so you can have reassurance that they are right. :)

Answer 2

Explanation:

As the angles are supplementary, they sum up to 180

Hence, 3x+40+80=180

3x+120=180

3x=60

x=20