Sagot :
-2x - 2y = 4|:(-2) 8y = -8x - 16|:(-8)
x+y=-2 -y=x+2 x+y=-2x+y=-2
Ansfwer : x-2 y -2
x+y=-2 -y=x+2 x+y=-2x+y=-2
Ansfwer : x-2 y -2
[tex]-2x - 2y = 4|:(-2)\\
8y = -8x - 16|:(-8)\\\\
x+y=-2\\
-y=x+2\\\\
x+y=-2\\
x+y=-2\\\\
x,y\in \mathbb{R}[/tex]