SOLUTION: two sides of a triangle have the same length. the third side measures 5m less than twice the common length. the perimeter of the triangle is 23m. what are the lengths of all three

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Question 622883: two sides of a triangle have the same length. the third side measures 5m less than twice the common length. the perimeter of the triangle is 23m. what are the lengths of all three sides?
Answer by ewatrrr(24785) About Me  (Show Source):
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Hi

two sides of a triangle have the same lengthhighlight%28x%29. 

the third side measures 5m less than twice the common length. 

the perimeter of the triangle is  23m. 

what are the lengths of all three sides?

 x + x + (2x-5) = 23cm

     4x = 28cm

  x = 7cm   sides are 7cm, 7cm and 9cm   (14-5)

and...

CHECKING our Answer***

 7cm  + 7cm + 9cm = 23cm