Question

The angles below are supplementary. What is the value of x? A pair of supplementary angles is shown. One angle measures 4x + 20, and the other angle measures 40. 5 7.5 15 30​

Answer 1

the angles added up are 180°, so:

180°= 4x+20°+40°

180°-20°-40°=4x

120°= 4x

120°/4=x

30°=x