а) -2x + 8x = -126x = -12x = -12/6x = -2
б) 5x - 3x = 15 - 172x = -2x = -2/2x = -1
в) 3x - 5x = -21 + 33-2x = 12x = 12/(-2)x = -6
г) -7x - 9x = -40 + 8-16x = -32x = -32/(-16)x = 2
а) -2x + 8x = -12
6x = -12
x = -12/6
x = -2
б) 5x - 3x = 15 - 17
2x = -2
x = -2/2
x = -1
в) 3x - 5x = -21 + 33
-2x = 12
x = 12/(-2)
x = -6
г) -7x - 9x = -40 + 8
-16x = -32
x = -32/(-16)
x = 2