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 .

1. (3-4/7)*х=5 2/3
3х-4/7х=5 2/3
2 3/7 х = 5 2/3
х = 2 1/3
2. (1 5/8 - 3/8)*х=2 1/12
1 5/8 х -3/8х= 2 1/12
1 1/4х= 2 1/12
х=1 2/3
3.(5/8 - 1/4) : х = 1/6
1/6х= 3/8
х= 2 1/4
4.  х*(11/12 - 1/4)=3/8
11/12х-1/4х=3/8
2/3х=3/8
х=9/16