Question

19/42-(5/42+1/5)
РЕШИТЕ ПОЖАЛУЙСТА!!!

Answer 1

19/42 - (5/42 + 1/5) = 19/42 - 5/42 - 1/5 =
= 14/42 - 1/5 = 1/3 - 1/5 = 5/15 - 3/15 = 2/15,

или:

1) 5/42 + 1/5 = 25/210 + 42/210 = 67/210,
2) 19/42 - 67/210 = 95/210 - 67/210 = 28/210 = 2/15