Step-by-step explanation:
[tex]y=-x+1 \\
-2x-y=2 [/tex]given
[tex] - 2x-( - x + 1)=2 \\ - 2x + x - 1 = 2 \\ - x = 2 + 1 \\ - x = 3 \\ x = 3[/tex]
put x
[tex]-2( - 3)-y=2 \\ 6 - y = 2 \\ - y = 2 - 6 \\ - y = - 4 \\ y = 4[/tex]
