a) -2x + 8x = -126x = -12x = -12 / 6x = -2
б) 5x - 3x = 15 - 172x = -2x = -2 / 2x = -1
в) 3x - 5x = -21 + 33-2x = 12x = 12 / -2x = -6
г) -7x - 9x = -40 + 8-16x = -32x = -32 / -16x = 2
Ответ: а) x = -2, б) x = -1, в) x = -6, г) x = 2.
a) -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
Ответ: а) x = -2, б) x = -1, в) x = -6, г) x = 2.