решите уравнение с дробями
2 7/9 : ( 3 3/4y - 11 2/3) + 1 6/7 = 2 4/21.

2 7/9 : ( 3 3/4y - 11 2/3) + 1 6/7 = 2 4/212 7/9 : ( 3 3/4y - 11 2/3) =  2 4/21 -  1 6/72 7/9 : ( 3 3/4y - 11 2/3) =1/33 3/4y - 11 2/3 = 2 7/9 : 1/33 3/4y - 11 2/3=8 1/33 3/4y =8 1/3 + 11 2/33 3/4y=20у=20 : 3 3/4у=5 1/3