Question

Hey can somebody please help me with this

Answer 1

x =4

Explanation:

sum of angles in a triangle = 180

(equilateral triangle) all sides are equal

180 ÷ 3 = 60

10x+20 =60

10x = 60 - 20

10x = 40

10x ÷10 = 40÷ 10

x = 4