Автор - SweetyAngel
а) 4 - 2х = - 6 - 4
- 2х + 4х = -6 - 4
2х = - 10
х = - 10 : 2
х = - 5
б) 5х + 6 = 12,5х
5х - 12,5х = - 6
- 7,5х = - 6
х = - 6 : ( - 7,5 )
х = 0,8
в) 4/2 - 7/2х = 5/4х - 1/2
- 7/2х - 5/4х = - 1/2 - 4/2
- 19/4х = - 5/2
х = - 5/2 : ( - 19/4 )
х = 5/2 • 4/19
х = 10/19 (это дробь)