1) x-(-17.85) = 1x + 17.85 = 1x = 12 - 17.8x = -5.85
2) 7.8 - x = 9.x = 7.8 - 9.x = -1.5
Ответ: x1 = -5.85, x2 = -1.5.
1) x-(-17.85) = 1
x + 17.85 = 1
x = 12 - 17.8
x = -5.85
2) 7.8 - x = 9.
x = 7.8 - 9.
x = -1.5
Ответ: x1 = -5.85, x2 = -1.5.