Can someone please help me with this please I need the right answer if you don’t know how to do geometry then don’t do this please thank you

3. Reflexive property of congruence

(since the statement states that a segment is congruent to itself)

4. SSS

(since 3 sides of one triangle are congruent to three sides of the other triangle)

SOLUTION:

Exterior angle = Sum of opposite interiors angles

.

15x - 5 = 43 + (9x - 6)

15x - 5 = 43 + 9x - 6

15x - 9x = 43 - 6 + 5

6x = 42

x = 7

.

x = 7