please please help me, i just really want to be done with my homework

Answer:
s+6+s+6+s+s+2s=102, s=18
Step-by-step explanation:
The perimeter is the sum of the side lengths, so
the equation is s+6+s+6+s+s+2s=102.
[tex]5s+12=102 \\ \\ 5s=90 \\ \\ s=18[/tex]