Resposta :
[tex]3x + x = 0[/tex]
[tex]4x = 0[/tex]
[tex]x = \frac{0}{4} [/tex]
[tex] \boxed{x = 0}[/tex]
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[tex]3x + x = 0[/tex]
[tex]4x = 0[/tex]
[tex]x = \frac{0}{4} [/tex]
[tex] \boxed{x = 0}[/tex]
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