Respuesta:
[tex]x - 30 = 60 \\ x = 60 + 30 \\ x = 90 \\ \\ \\ 90 - 30 = 60 \\ [/tex]
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Respuesta:
[tex]x - 30 = 60 \\ x = 60 + 30 \\ x = 90 \\ \\ \\ 90 - 30 = 60 \\ [/tex]
90 - 30 = 60
60 = 60