Respuesta:
[tex]3(x + 1) - 12 = 18[/tex]
[tex]3x + 3 - 12 = 18[/tex]
[tex]3x - 9 = 18[/tex]
[tex]3x = 18 + 9[/tex]
[tex]3x = 27[/tex]
[tex]x = \frac{27}{3} [/tex]
[tex]x = 9[/tex]
Saludos
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Respuesta:
Hola.
[tex]3(x + 1) - 12 = 18[/tex]
[tex]3x + 3 - 12 = 18[/tex]
[tex]3x - 9 = 18[/tex]
[tex]3x = 18 + 9[/tex]
[tex]3x = 27[/tex]
[tex]x = \frac{27}{3} [/tex]
[tex]x = 9[/tex]
Saludos