Answer :
[tex]perimeter=2length+2width\\\\
120=43*2+2width\\\\
120=86+2width\ \ \ | subtract\ 86\\\\
34=2width\ \ \ | divide\ by\ 2\\\\
width=17in[/tex]
120=43*2+2width\\\\
120=86+2width\ \ \ | subtract\ 86\\\\
34=2width\ \ \ | divide\ by\ 2\\\\
width=17in[/tex]