Question

Two sides of a triangle have the same length. the third side measures 7 m less than twice the common length. the perimeter of the triangle is 13 m. what are the lengths of the three​ sides?

Answer 1

hello


2 côtés = 2 x

3 ème côté = 4 x - 7

2 x + 4 x - 7 = 13
6 x = 13 + 7
6 x = 20
x = 20/6 = 10/3 m