Respuesta :

Answer:

X=6

Step-by-step explanation:

We know that the perimeter is the sum of all its sides.

[tex]P=63\\P=(4x-3)+(4x-3)+(4x-3)\\P=P\\(4x-3)+(4x-3)+(4x-3)=63\\12x-9=63\\12x=72\\x=\frac{72}{12} \\x=6[/tex]

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