SOLUTION: Two sides of a triangle have the same length. The third side measures 3 m less than twice the common length. The perimeter of the triangle is 13 m. What are the lengths of the thre

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Question 1059200: Two sides of a triangle have the same length. The third side measures 3 m less than twice the common length. The perimeter of the triangle is 13 m. What are the lengths of the three​ sides?
Answer by ikleyn(52781) About Me  (Show Source):
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Two sides of a triangle have the same length. The third side measures 3 m less than twice the common length.
The perimeter of the triangle is 13 m. What are the lengths of the three​ sides?
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Let x be the common length of two congruent sides of the triangle.
Then the third side is 2x-3 and the perimeter is (x + x + (2x-3)) m.

The equation is

x + x + 2x-3 = 13.

Solve for x.


For many other similar solved problems see the lessons
    - Solved problems on the perimeter and side lengths of a triangle
    - Solved problems on the perimeter and side lengths of a right-angled triangle
    - Solved problems on the perimeter and the side lengths of a parallelogram
    - Solved problems on the perimeter and side lengths of a rectangle
in this site.

Also, you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this online textbook under the topic
"Finding the perimeter and sides lengths of triangles, parallelograms, rectangles and polygons".