Odpowiedź:
2 i 2/3 + 2 i 4/5 + 1/3 = 2 i 10/15 + 2 i 12/15 + 5/15 = 4 i 27/15 = 5 i 12/15 = 5 i 4/5
7/9 + 1 i 3/4 + 1/4 = 28/36 + 1 i 27/28 + 9/36 = 1 i 64/36 = 2 i 28/36 = 2 i 7/9
2 i 5/7 + 7 i 2/5 + 2 i 2/7 + 3 i 3/5 = 2 i 25/35 + 7 i 14/35 + 2 i 10/35 + 3 i 21/35 = 14 i 70/35 = 16
2 i 3/4 + 1 i 1/6 + 4 i 5/6 + 1 i 2/4 = 2 i 9/12 + 1 i 2/12 + 4 i 10/12 + 1 i 6/12 = 8 i 27/12 = 10 i 3/12 = 10 i 1/4
zad 6
3 i 5/7 + x = 4
x = 4 - 3 i 5/7 = 3 i 7/7 - 3 i 5/7 = 2/7
x = 2/7
5/9 + y = 1
y = 1 i 5/9 = 9/9 - 5/9 = 4/9
y = 4/9
3 i 8/10 + z = 5
z = 5 - 3 i 8/10 = 4 i 10/10 - 3 i 8/10
z = 1 i 2/10
