Perimeter of any triangle is:
[tex]\text{Perimeter}=\text{length of first side +length of second side + length of third side}[/tex]
In right angle triangle is length of sides is x, x+5, x-3.
Then the perimeter is:
[tex]\begin{gathered} \text{perimeter}=x+x+5+x-3 \\ =3x+5-3 \\ =3x+2 \end{gathered}[/tex]
