Ответ:
6x^2-9x+1/3=0
18x^2-27x+1=0
D=27^2-4*18=657
x1=(27+(657)^(1/2))/36
x2=(27-(657)^(1/2))/36
5х-11:7=32:56
5х-11:7=4:7
5х=15:7
х=3:7