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![\frac{1}{9}](/tpl/images/4811/2465/f5492.png)
-x = 1
-12 = -10 ![\frac{8}{9}](/tpl/images/4811/2465/c7dc6.png)
x = 10![\frac{8}{9}](/tpl/images/4811/2465/c7dc6.png)
5 8/9 + х = 6 1/8
x = 6 1/8 - 5 8/9 =![\frac{17}{72}](/tpl/images/4811/2465/e6ebd.png)
8-х=4 1/7
-x = 4 1/7 - 8 = -3 6/7
x = 3![\frac{6}{7}](/tpl/images/4811/2465/f36a0.png)