Resposta:
[tex]x = \frac{3}{4}[/tex]
Explicação passo-a-passo:
[tex]3x + 9 - 5 + 0 \\\\3x = 0 - 9 + 5\\\\3x = -9 + 5\\\\3x = -4\\\\x = \frac{3}{4}[/tex]
