Answer:
x = 20
Step-by-step explanation:
The 3 angles lie on a straight line and sum to 180° , that is
3x + 80 + 2x = 180
5x + 80 = 180 ( subtract 80 from both sides )
5x = 100 ( divide both sides by 5 )
Here,3x°+80°+2x=180° [Angles on a line]
or,3x°+2x°+80°=180°
or,5x°+80°=180°
or,5x°=180°-80°
or,5x°=100°
or,x°=100/5
Therefore,x°=20°
