{2x^(2)-3xy=-4
{3x+y =5
y=(5-3x)
2x^2-3x(5-3x)=-4
2x^2-15x+9x^2+4=0
11x^2-15x+4=0
D=(-(-15))^2-4*11*4=225-176=49
x1=(-(-15)-V49)/2*11=(15-7)/22=8/22=(4/11)
x2=(-(-15)+V49)/2*11=(15+7)/22=22/22=1
y1=5-3*x1
y1=5-3*(4/11)=(55-12)/11=43/11
y1=3(10/11)
y2=5-3*x2=5-3*1=5-3
y2=2
Ответ: ((4/11);3(10/11)) и (1;2)