Question

What is the value of x?

Answer 1

x = -8

Explanation:

Triangles = 180°

So,

65 + 40 + (x + 83) = 180°

Combine like terms:

105 + (x + 83) = 180°

Subtract 105 from 180

x + 83 = 75

Subtract 83 on both sides

x = -8