Answer:
x = 22
Step-by-step explanation:
All the sides are equal. So, it is and equilateral triangle and so all the angles will be equal.
Each angle of equilateral angle = 180/3 = 60
3x - 6 = 60 {Add 6 to both sides}
3x = 60 +6
3x = 66 {Divide both sides by 3}
x = 66/3
x = 22
