x-1 2/9=6 20/81-3 5/27
x-1 2/9=6 20/81-3 15/81
x-1 2/9=3 5/81
x=3 5/81+1 2/9
x=3 5/81+1 18/81
x=4 23/81
x-1 2/9=6 20/81-3 5/27
x-1 2/9=6 20/81-3 15/81
x-1 2/9=3 5/81
x=3 5/81+1 2/9
x=3 5/81+1 18/81
x=4 23/81