1) 2,(5)
2.(5) = х
10х = 25.(5)
10х - х = 25.(5) - 2.(5)
9х = 23
х = 23/9
2)8,(16)
x = 8.(16)
100x = 816.(16)
100x - x = 816.(16) - 8.(16)
99x = 808
x = 808/99
3) x = 4.(2)
10x = 42,(2)
10x - x = 42.(2) - 4.(2)
9x = 38
x = 38/9
4) 7.(13) = x
100x = 713.(13)
100x - x = 713.(13) - 7.(13)
99x = 706
x = 706/99
