ANSWER
5
EXPLANATION
The given shape is a rhombus
The sum of interior angles of a rhombus add up to 360 degrees
The opposite angles of a rhombus are equal to each other.
hence, adding up all the interior angles, we have;
[tex]\begin{gathered} 9x+9x+135+135=360 \\ 18x+270=360 \end{gathered}[/tex]
collecting like terms, we have;
[tex]\begin{gathered} 18x=360-270 \\ 18x=90 \\ x=\frac{90}{18} \\ x=5 \end{gathered}[/tex]
Therefore the value of x is 5
