Question

An angle is 20° less than four times its supplement. Find the two angles.

Answer 1

hi

let the smaller angle be x

then 4x-20°

so x+4x-20=180

5x=200

x=40

4x-20=140

Answer 2

Answer:

Given that

Ratio between the supplementry =4:5

So

4x+5x =180

9x =180

x =180 =20

9

x=20

1 st angel=4x=4×20

2 nd angle =5×20 =100