Natali Belska
Гений
(67291)
1 месяц назад
{ 14xy = 84 ---> (:) на 14
{ 19y = 19x + 19 ---> (:) на 19
=>
{ xy = 6
{ y = x + 1
=>
{ x * (x+1) = 6
x^2 + x - 6 = 0 ---> решить =>
x1 = - 3 ---> y1 = x1 + 1 = (-3) + 1 = - 2
x2 = 2 ---> y2 = x2 + 1 = 2 + 1 = 3