An angle is 20degrees more than three times the given angle . If the two angles are supplementary , the angles are :
a. 20 degrees , 160 degrees
b. 40 degrees , 140 degrees
c. 60 degrees , 120 degrees
d. 70 degrees , 110 degrees
let,
given angle be x
1st angle - x
2nd angle -20 +3x
x+20+3x = 180 degrees
4x=160degrees
x=40degrees
1st angle = x=40 degrees
2nd angle = 20+3x = 20+3(40) = 20 +120 =140degrees