Question

An angle is 20degeree less than 4 times than its supplement

Answer 1

Two angles are said to be supplement if their sum is 180°. So let the first angle be x°.

Another angle = 4×x-20°

= 4x-20°

So,

x+4x-20 = 180

x+4x = 180+20

5x = 200

x = 200/5

x = 40

So the first angle = x° = 40°

Second angle(your answer) = 4x-20°

= 4×40°- 20°

= 160°- 20°

= 140°

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