Answer:
x = 3
Explanation:
B using the perpendicular theorem
Since MB is a perpendicular bisector of JK , then JB = BK
and Δ JMK is isosceles with congruent legs , so
JM = MK ( substitute values )
9x - 18 = 3x ( subtract 3x from both sides )
6x - 18 = 0 ( add 18 to both sides )
6x = 18 ( divide both sides by 6 )
x = 3