(x-3):8 1/2=0,2: 4 1/4

4 1/4*(x-3)=8 1/2*0,2
4 1/4x-12 3/4=1 7/10
4 1/4x=1 7/10+12 3/4
4 1/4x=1 14/20+12 15/20
4 1/4x=13 29/20
x=13 29/20:4 1/4
x=289/20*4/17
x=17/5
x=3 2/5