Question

2×+y= -3 x+y= -1 como??????​

Answer 1

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

2x= -3 -y
Y= -1-x

2x= -3 -(-1-x)
2x= -3 +1+x
2x -x = -2
X=-2

Y= -1 -(-2)
Y=-1+2= 1