Хелп плиз 1)2x+y=3 x-3=5y 2)x^2+y^2=4 x-2=y

Question

Хелп плиз
1)2x+y=3
x-3=5y
2)x^2+y^2=4
x-2=y

Answer 1

1) y=3-2x
x-3=5(3-2x)
x-3=15-10x
11x=18
x=18/11
y=3-36/11=-3/11
2) y=x-2
x^2+(x-2)^2=4
x^2+x^2-4x+4=4
x^2-2x=0
x(x-2)=0
x=0 y=0-2=-2
x=2 y=2-2=0