21/4: 3*(3-1 2/3)+5/6 решите уравнение (х*8/9)-2 13/18=1 5/6

1) 2 1/4:3=9/4*1/3=3/4
2)3-1 2/3=1 1/3
3)3/4*1 1/3=3/4*4/3=1
4)1+5/6=1 5/6

(x*8/9)-2 13/18=1 5/6
x*8/9==1 5/6+2 13/18
x*8/9=3 28/18=4 10/18=4 5/9
x=4 5/9:8/9
x=41/9*9/8
x=41/8
x=5 1/8