Respuesta :

bmarro01
i think the answer is m=5
altavistard
I have to assume that the instructions are to "simplify -5+7m-20=20-2m."

If that's the case:

Group like terms together:  7m + 2m = 20 +5 + 20
                                                9m      = 45
                                                  m   =  5 (answer)