Explicación paso a paso:
[tex]120 + 5x = 180 \\ 5x = 180 - 120 \\ 5x = 60 \\ x = 12[/tex]
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Explicación paso a paso:
[tex]120 + 5x = 180 \\ 5x = 180 - 120 \\ 5x = 60 \\ x = 12[/tex]