x^2-y^2=13x + y = -5 => x = -y-5
(-y-5)^2 - y^2=13y^2+10y+25 - y^2=1310y+25=1310y=-12y=-1.2x = 1.2 - 5 = -3.8
ответ: (-3.8;-1.2)
x^2-y^2=13
x + y = -5 => x = -y-5
(-y-5)^2 - y^2=13
y^2+10y+25 - y^2=13
10y+25=13
10y=-12
y=-1.2
x = 1.2 - 5 = -3.8
ответ: (-3.8;-1.2)