Найду корень уравнения: 2,5x+12=2x-13
5*x --- + 12 = 2*x - 13 2
(5/2)*x+12 = 2*x-13
5/2x+12 = 2*x-13
x = -25 / (1/2)
x1 = -50
сумма
-50
=
произведение
x1 = -50.0