The angles below are supplementary. What is the value of x?
A pair of supplementary angles is shown. One angle measures 3x + 40, and the other angle measures 80.
(5 points)
Group of answer choices
26.7
20
40
16.6
To find the value of x, we can set up the equation:
3x + 40 + 80 = 180 (since supplementary angles add up to 180 degrees)
Combine like terms:
3x + 120 = 180
Subtract 120 from both sides:
3x = 60
Divide by 3:
x = 20
Therefore, the value of x is 20.