Question

X+y=3 2x-y=1 quiero en el plano cartesiano gracias ..!

Answer 1

x+y=3
2x-y=1

x+y=3
(x=3-y)

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

2(3-y)=1(1+y)
6-2y=1+y
-2y-y=-6+1
-3y=-5
 y=5/3
 
x=3-5/3
x=-2/3
 
solucion
X=5/3
Y=-2/3
 en plano
X= -0.7
Y=1.7