Answer
The x-coordinate of the center of mass is $~~-6.5~cm$
Work Step by Step
By symmetry, the x-coordinate of the center of mass is:
$x_{com} = -\frac{d_3}{2}$
$x_{com} = -\frac{13.0~cm}{2}$
$x_{com} = -6.5~cm$
The x-coordinate of the center of mass is $~~-6.5~cm$
