Question

(3х+0,9)*1 1/9=4 1/3 

Answer 1

(3x+0,9)*1 1/9=4 1/3

(3x+9/10)*10/9=13/3

30x/9 +1=13/3

10x/3=13/3 -1

 10x/3=13/3 - 3/3

 10x/3=10/3

10x*3=3*10

30x=30

x=1 

Answer 2

3х*10/9+9/10*10/9=13/3

10/3x+1=13/3

10/3x=3 1/3

3 1/3x=3 1/3

x=1