Solve for X exterior Angle Theorem
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x = 10, x = 5

Step-by-step explanation:

The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.

(13)

12x + 8 is an exterior angle of the triangle , then

12x + 8 = 7x - 9 + 67

12x + 8 = 7x + 58 ( subtract 7x from both sides )

5x + 8 = 58 ( subtract 8 from both sides )

5x = 50 ( divide both sides by 5 )

x = 10

(14)

13x - 5 is an exterior angle of the triangle , then

13x - 5 = 5 + 3x + 40

13x - 5 = 3x + 45 ( subtract 3x from both sides )

10x - 5 = 45 ( add 5 to both sides )

10x = 50 ( divide both sides by 10 )

x = 5

hdjd

step-by-step explanation: