ответ:1/3*(5/12- 4m)=4/9*(1 1/2 *m -3/8);
1/3*5/12-4/3m =4/9*3/2m-4/9*3/8;
5/36- 4/3 m=2/3 m -1/6;
2/3m +4/3 m= 5/36+1/6;
2 m =5/36+ 6/36;
m =11/36:2 = 11/36* 1/2;
m=11/72.
