We have 5 circle gaps with the value x and 1 square gap with the value 2.
It seems that the sum of every circle and square gap must sum the value 17.
We can express this as following:
[tex]\begin{gathered} x+x+x+x+x+2=17 \\ 5\cdot x+2=17 \\ 5\cdot x=17-2=15 \\ x=\frac{15}{5} \\ x=3 \end{gathered}[/tex]Thus, the value of x is 3