Respuesta :

Answer:

14

Step-by-step explanation:

28m + 21 = 413

28m = 413 - 21

        = 392

m = 392/28

   = 14

Therefore m is 14 :)

Answer:

14

Step-by-step explanation:

28m+21=413

Subtract both sides by 21

28m=413-21

28m=392

m=14