Question 477776
two angles are supplementary if one is 30° less then four times the other , find the angles 

Let x = the 1st angle 
180-x = the 2nd angle

x = 4(180-x) - 30
x = 720 - 4x - 30
5x= 690
x = 138

180-x = 180-138 = 42

The angles are 138 and 42.