Given data:
Perimeter of the saquare is 36 units.
The side of square is x+3
the formula to find the perimeter of the square is 4a.
to find the value of x ,
[tex]\begin{gathered} 4(x+3)=36 \\ 4x+12=36 \\ 4x=36-12 \\ 4x=24 \\ x=\frac{24}{4} \\ x=6 \end{gathered}[/tex]
Therefore, x = 6.
