(4 1/9 - а) + 8 5/9=9 2/9
37/9 - a + 77/9 - 83/9 = 0
-a = -31/9 :(-1)
a = 31/9 = 3 4/9
5 3/7 - (b-2 1/7)=2 4/7
38/7 - b + 15/7 - 18/7 = 0
-b = -35/7 :(-1)
b = 35/7 = 5
(4 1/9 - а) + 8 5/9=9 2/9
37/9 - a + 77/9 - 83/9 = 0
-a = -31/9 :(-1)
a = 31/9 = 3 4/9
5 3/7 - (b-2 1/7)=2 4/7
38/7 - b + 15/7 - 18/7 = 0
-b = -35/7 :(-1)
b = 35/7 = 5