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A fence was installed around the edge of a rectangular garden. The length, $l$ , of the fence was $5$ feet less than $3$ times its width, $w$ . The amount of fencing used was $90$ feet.
Write a system of equations or write an equation using one variable that models this situation.

$3w-l=5$
$2l+2w=90$

$3w+l=5$
$2l+2w=90$

$3w-l=35$
$2l+2w=90$

$3w-l=5$
$2l+2w+90=0$

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