Odpowiedź:
a = [-2/3 * (5 - 6 * 2 1/3)]/(3 2/5 - 2,2 : 2/5) = [-2/3 * (5 - 6 * 7/3)]/(3 2/5 -
- 22/10 * 5/2) = [-2/3 * (5 - 2 * 7)]/(3 2/5 - 11/5 * 5/2) = [-2/3 * (5 - 14)]/(3 2/5 -
- 11/2) = [-2/3 * (-9)]/(3 2/5 - 5 1/2) = 6/(3 4/10 - 5 5/10) = 6 : (-2 1/10) =
= -6 : 21/10 = -6 * 10/21 = -60/21 = -2 18/21 = -2 6/7
liczba przeciwna
-a = 60/21 = 2 6/7
odwrotna
1/a = -21/60 = -7/20
Szczegółowe wyjaśnienie:
