Answer:
x = 4
Explanation:
A segment midpoint is a point on a line segment that divides the segment into two congruent segments.
Therefore, if C is the midpoint of AQ, then:
⇒ AC = CQ
⇒ 9x - 5 = 31
⇒ 9x - 5 + 5 = 31 + 5
⇒ 9x = 36
⇒ 9x ÷ 9 = 36 ÷ 9
⇒ x = 4