5(2/3):(1/3)-1(7/12)*6=7,5
1) 1(7/12)*6=(19*6)/12=(19/2)
2) 5(2/3):(1/3)=(17*3)/3=17
3) 17-(19/2)=(34-19)/2=15/2=7(1/2)=7,5
