Пошаговое объяснение:
4) 2x - 5 = 0,
2x = 5,
x = 5/2.
5) 7-2x = 0,
-2x = - 7,
x = 7/2,
6) 4x-9=x,
3x = 9,
x = 3.
Пошаговое объяснение:
4) 2x - 5 = 0,
2x = 5,
x = 5/2.
5) 7-2x = 0,
-2x = - 7,
x = 7/2,
6) 4x-9=x,
3x = 9,
x = 3.