- 3х - 4х = 56 - 14
- 7х = 42
х = 42 : (-7)
х = - 6
3/4х - 2/3х = 9 - 6
9/12х - 8/12х = 3
1/12х = 3
х = 3 : 1/12
х = 4
- 3х - 4х = 56 - 14
- 7х = 42
х = 42 : (-7)
х = - 6
3/4х - 2/3х = 9 - 6
9/12х - 8/12х = 3
1/12х = 3
х = 3 : 1/12
х = 4