{2x+5y=5 {X-3y=1 {3x-5y=-2 {-x+4y=-3

Question

{2x+5y=5
{X-3y=1

{3x-5y=-2
{-x+4y=-3

Answer 1

X=1+3y
2(1+3y)=5
2+6y=5
6y=4
y=2/3
x=1+2=3
Ответ:(3;2/3)

-x=-3-4y
x=3+4y
3(3+4y)-5y=-2
9+12y-5y=-2
7y=-11
y=-7/11
x=3+4*(-7/11)=3-28/11=5/11
Ответ:(5/11;-7/11)