Question 1048679
Let {{{ w }}} = the width in yards
{{{ 2w - 20 }}} = the length in yards
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Using the formula for perimeter:
{{{ 2w + 2*( 2w - 20 ) = 380 }}}
{{{ 2w + 4w - 40 = 380 }}}
{{{ 6w = 420 }}}
{{{ w = 70 }}}
and
{{{ 2w - 20 = 2*70 - 20 }}}
{{{ 2w - 20 = 120 }}}
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The width is 70
The length is 120 
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check:
{{{ P = 2*70 + 2*120 }}}
{{{ P = 140 + 240 }}}
{{{ P = 380 }}}
OK