Length and width

The length of a rectangle is 7 cm more than the width. Find the width and length if the perimeter of the rectangle is 78 cm.

Correct answer:

w =  16 cm
l =  23 cm

Step-by-step explanation:

l=7+w 78=2 l+2 w  lw=7 2l+2w=78  Pivot:Row1Row2 2l+2w=78 lw=7  Row221 Row1Row2 2l+2w=78 2w=32  w=232=16 l=2782w=2782 16=23  l=23 w=16=16 cm

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