4 2/15 - 3 1/9x = 1 4/5

4 2/15 - (3 1/9)x = 1 4/5;

(3 1/9)x = 4 2/15 - 1 4/5;

(28/9)x = 4 2/15 - 1 12/15;

(28/9)x = 62/15 - 27/15;

(28/9)x = 35/15;

(28/9)x = 7/3;

x = (7/3):(28/9);

x = (7/3)*(9/28);

x = 3/4;

3 1/9х= 4 2/15- 1 4/5 ; 3 1/9х=4 2/15 - 1 12/15 ; х= 2 5/15=2 1/3 ; 28/9х=7/3 ; х= 7/3 * 9/28 ; х= 3/4