Respuesta :

cutydragy

Answer:

7.5 or 15/2

Step-by-step explanation:

Since the sides length are equal,

3(x-1) = 3x - 3 = 5x - 6

2x = 3 ==> x = 3/2

==> side length =  3 * (1.5 - 1) = 1.5

==> perimeter = 5 * 1.5 = 7.5

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