Resposta :

[tex]\frac{x+9}{x}=\frac{x+45}{x+9} \\ x^2+18x+81=x^2+45x \\ x^2 - x^2 + 18x - 45x= -81\\ -27x=-81 \\ x=\frac{81}{27}\\ x=3\\ 3,12,48\\ q=\frac{12}{3}\\ q=4[/tex]

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