Explicación paso a paso:
[tex]x + 2(30) = 84 \\ x + 60 = 84 \\ x = 84 - 60 = 24 \\ x = 24[/tex]
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Explicación paso a paso:
[tex]x + 2(30) = 84 \\ x + 60 = 84 \\ x = 84 - 60 = 24 \\ x = 24[/tex]