Question

solve for x if m is a midpoint.

Explanation:

Step1: Use mid - point property

If M is the mid - point of line segment AB, then the two sub - segments are equal. So, $5=x - 9$.

Step2: Solve for x

Add 9 to both sides of the equation: $5+9=x - 9+9$.
$14=x$.

Answer:

$x = 14$