Answer:
6
Step-by-step explanation:
( 7x + 6 ) and ( 9x - 6 ) are alternate interior angles.
Note : -
Alternate interior angles are equal.
9x - 6 = 7x + 6
9x - 7x = 6 + 6
2x = 12
x = 12 / 2
x = 6
The 2 given angles are vertically opposite and are congruent , that is
9x - 6 = 7x + 6 ( subtract 7x from both sides )
2x - 6 = 6 ( add 6 to both sides )
2x = 12 ( divide both sides by 2 )
