Question

Find the value of x.
(3x+20) º
12°

Answer 1

12°

Explanation:

a straight line adds up to 180°

(3x+20)+2x=180

3x+2x+20=180

5x+20=180

5x=180-20

5x=60

5x/5=60/5

x=12

x=12°

Answer 2

x=32°

Explanation:

2x+3x+20=180 co interior angle

5x=180-20

x=160/5=32°