Question 415969
Let the width =   x yards

==>  length   = x + 1.5 yards


Perimeter =  40 yards

==>  2(length + width) = 40

==>  2( x + 1.5 + x ) = 40


==>  2( 2x + 1.5 ) = 40


==> {{{(2( 2x + 1.5 ))/2 = 40/2}}}

==> {{{  2x + 1.5   = 20 }}}


==>  {{{  2x + 1.5 - 1.5   = 20-1.5  }}}  


==> {{{  2x     = 18.5 }}}

==> {{{  2x /2   = 18.5/2 }}}



==> {{{ x = 9.25 }}}

so the width is  9.25 yards


and length is  7. 75 yards