Question

(3x)°
(6x-12)
(2x+13)° find the value of x

Answer 1

x = 25

Explanation:

The two interior angles equal the exterior angle.

6x - 12 = 3x + 2x + 13 Combine like terms

6x - 12 = 5x + 13 Subtract 5x from both sides of the equation

6x -5x - 12= 5x - 5x + 13

x - 12 = 13 Add 12 to both sides of the equation

x - 12 + 12 = 13 + 12

x = 25