Question

Y=-x+1 -2x-y=2 substitution

Answer 1

Step-by-step explanation:

$y=-x+1 \\ -2x-y=2$given

$- 2x-( - x + 1)=2 \\ - 2x + x - 1 = 2 \\ - x = 2 + 1 \\ - x = 3 \\ x = 3$

put x

$-2( - 3)-y=2 \\ 6 - y = 2 \\ - y = 2 - 6 \\ - y = - 4 \\ y = 4$