3×(x-4 13)+1 16=-3,5

3(х-4 1/3)=-1 1/6 - 3 1/2=-7/6-7/2=-7/6-21/6= - 28/6= - 14/3
3(х-4 1/3)= - 14/3
х-4 1/3= -14/3:3= - 14/3*1/3= - 14/9
х-4 1/3= -14/9
х=4 1/3-14/9=39/9-14/9=25/9=2 7/9
х=2 7/9