Question

METODO DE SUSTITUCION

x+y=3
2x−y=0

Answer 1

X + 2x =3
3x=3
x=3/3
x=1

×+y=3
1+y=3
y=3-1
y=2

×+y=3
1+2=3

Answer 2

x+y=3
2x−y=0

x=3-y

2(3-y)-y=0
6-2y-y=
-3y= -6
   y= -6/-3
   y= 2

x+y=3
x+2=3
 x= 3-2
 x= 1