Answer :
[tex]x-length\\\\
y-width\\\\
Perimeter=2length+2width\\\\
x-9=3y\ \ \--->\ \ x=3y+9\\
2x+2y=98\\\\2(3y+9)+2y=98\\\\
6y+18+2y=98\\\\
8y+18=98\ \ \ |subtract\ 18\\\\
8y=80\ \ \ |divide\ by\ 8\\\\
y=10inch\\\\
x=39inch
[/tex]Answer here