Respuesta :

Answer:

m=-7

Step-by-step explanation:

Sorry it took forever

Har1Ha1er

Answer:

-7

Step-by-step explanation:

-12m+4m-5-9 = 8m-13m+15-8

-8m-14 = -5m+7

-8m+5m = 7+14

-3m = 21

m = -21/3

m = -7

-12*(-7)+4*(-7)-5-9 = 8*(-7) - 13*(*-7)+15-8

84-28-14 = -56+91+7

42 = 42

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good job