Respuesta :

AL2006
OK.
Watch closely.
I'll try to go slow:

You said                                       c     = a m t

Divide each side by ' a t ' :             c/at = m
When we move a letter to the other part of equation, it would be reversed (plus became minus, multiplication became division, etc

c = a x m x t

m  = c/ (a x t)

Hope this helps