Explicación paso a paso:
[tex] \frac{x + 12}{3} = 15 \\ x + 12 = 45 \\ x = 45 - 12 \\ x = 33[/tex]
sobre 3? o al cubo?........
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Explicación paso a paso:
[tex] \frac{x + 12}{3} = 15 \\ x + 12 = 45 \\ x = 45 - 12 \\ x = 33[/tex]
sobre 3? o al cubo?........