Question

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

Answer 1

Since these are both set equal to y the easiest way to solve is to set the equations equal to each other.
-2x + 3= -x-1
add 2x to both sides
3= x-1
add 1 to both sides
4=x

Answer 2

4,-5 is your x and y