Natali Belska
Гений
(67383)
1 месяц назад
{ x*t + x = 4
{ x*t + t = 3
=> вычесть:
(x*t + x) - (x*t + t) = 4 - 3
x - t = 1
t = x - 1
=> из условия:
{ x*t + x = 4
x*(x - 1) + x = 4
x^2 - x + x = 4
x^2 - 2^2 = 0
(x + 2)(x - 2) = 0
x1 = - 2 ---> t1 = x1 - 1 = (-2) - 1 = - 3
x2 = + 2 ---> t2 = x2 - 1 = 2 - 1 = 1