А
7 3/17-t=5 8/17
t=7 3/17-5 8/17=6 20/17-5 8/17
t=1 12/17
б
x-8 8/19=3 18/19
x=3 18/19+8 8/19
x=11 26/19=12 7/19
в
(5 17/35+y=9 32/35-1 19/35
5 17/35+y=8 13/35
y=8 13/35-5 17/35=7 48/35-5 17/35
y=2 31/35
г
8 5/27-x=1 25/27+2 25/27
8 5/27-x=3 50/27=4 23/27
x=8 5/27-4 23/27=7 32/27-4 23/27
x=3 9/27=3 1/3