1.
х = 2.1(6)
10х = 21.(6)
100х = 216.(6)
100х - 10х = 216.(6) - 21.(6)
90х = 195
х = 195/90 = 13/6
2
х = 5.14(33)
100х = 514.(33)
1000х = 5143.(33)
1000х - 100х = 5143.(33) - 514.(33)
900х = 4629
х = 4629/900 = 1543/300
1.
х = 2.1(6)
10х = 21.(6)
100х = 216.(6)
100х - 10х = 216.(6) - 21.(6)
90х = 195
х = 195/90 = 13/6
2
х = 5.14(33)
100х = 514.(33)
1000х = 5143.(33)
1000х - 100х = 5143.(33) - 514.(33)
900х = 4629
х = 4629/900 = 1543/300