The length of a rectangle is 5 centimeters less than twice its width. The perimeter of the rectangle is 80 cm. What are the dimensions of the rectangle?

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Jun 3, 2016

Answer:

#15 #cm x #25# cm

Explanation:

If #x# is the width #w#, then the length #l # is #2x-5#

The perimeter #p = 2w+2l#

So

#80 = 2x+2(2x-5)#
#80 = 6x - 10#
#6x = 90#

#:. x = 15#

The length is #2*15-5 = 25#

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