42*х=546 , b:17=15, 54:c =3
42*х=546х=546/42=13, b:17=15b=17*15=255, 54:c =3c=54/3=18.
спасибо
42*х=546 х=546/42 х=13 b:17=15 b=17*15 b=255 54:с=3 с=54:3 с=18