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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?

Respuesta :

frenchiegirl
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 

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