Respuesta :

3m - 5m - 12 = 7m - 88 - 5

-2m - 12 = 7m - 88 - 5 

-2m - 12 = 7m - 93

-12 = 7m - 93 + 2m

-12 = 9m - 93

-12 + 93 = 9m

81 = 9m

9 = m

hope that helps, God bless!
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