решите уравнения:
1) (3 - 4/7) * x = 5 2/3
2) (1 5/8 - 3/8) * x = 2 1/12
3) (5/8 - 1/4) : x = 1/6
4) x * (11/12 - 1/4) = 3/8

20 баллов.

1. (3-4/7)*х=5 2/33х-4/7х=5 2/32 3/7 х = 5 2/3х = 2 1/32. (1 5/8 - 3/8)*х=2 1/121 5/8 х -3/8х= 2 1/121 1/4х= 2 1/12х=1 2/33.(5/8 - 1/4) : х = 1/61/6х= 3/8х= 2 1/44.  х*(11/12 - 1/4)=3/811/12х-1/4х=3/82/3х=3/8х=9/16