А) (х+8 17/36)=25 1/36-7 31/36
х+8 17/36=17 6/36
х=17 6/36- 8 17/36
х=8 25/36
б)у=12 13/45-3 23/45+5 17/45
у=14 7/45
(6m+5)-(m-1) = 6m+5-m+1 = 5m+6
(2x+y)-(x+y) = 2x+y-x-y = x
(2m-3n)+(2m+3n) = 2m-3n+2m+3n = 4m
7 2/9 - х = 1/6
65/9 - х=1/6
-х=1/6 - 65/9
-х= - 127/18
х= 127/18= 7 1/18
там 1)7 1/18