Question

solve using substitution?


I have no idea how to do this ._.
x=y-1 and -x+y=-1

Answer 1

x=y-1 and -x+y=-1
Plug in x = y-1 into second equation
-(y-1)+y=-1
y+1+y=-1
2y+1=-1
2y = -2
y=-1

x = -1 - 1 = -2

(-2, -1)