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Math·Algebra·Linear equations in two variables

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The figure shows a rectangle with a length of $l$ centimeters (cm) and a width of $w$ cm. The rectangle has a perimeter of 118 cm. Which equation gives the perimeter in terms of $l$ and $w$?

A

$118=2l+2w$

B

$118=2l-2w$

C

$118=l+w$

D

$118=l-w$