-6/7х= -9
-8*2/3+4х=6

1) -6/7х= -9
х= -9: (-6/7)
х= 9 * 7/6
х= 21/2
х= 10 1/2
х= 10,5

2)- 8 * 2/3 +4х= 6
- 16/3+4х=6
4х=6+16/3
4х= 6/1+16/3
4х= 18/3+18/3
4х= 34/3
х= 34/3 : 4
х= 34/3 * 1/4
х= 34/12
х= 17/6
х= 2 5/6