12-х=1
-x = 1 -12 = -10
x = 10
5 8/9 + х = 6 1/8
x = 6 1/8 - 5 8/9 =
8-х=4 1/7
-x = 4 1/7 - 8 = -3 6/7
x = 3
12-х=1
-x = 1 -12 = -10
x = 10
5 8/9 + х = 6 1/8
x = 6 1/8 - 5 8/9 =
8-х=4 1/7
-x = 4 1/7 - 8 = -3 6/7
x = 3