Question

Triangle Theorems sold for X

Answer 1

x = 8

Explanation:

Apply the exterior angle theorem.

Thus:

45 + 6x + 7 = 13x - 4

Add like terms

52 + 6x = 13x - 4

52 + 6x - 13x = 13x - 4 - 13x

52 - 7x = -4

52 - 7x - 52 = -4 - 52

-7x = -56

-7x/-7 = -56/-7

x = 8