Answer:
Use the Substitution method to solve this system of equations:
.
x=-y-1
x-y=-11
.
Substitute -y-1 for x in the second equation. (We can make this move because the first equation tells us that whatever x is, it is equal to -y-1.)
.
x-y=-11
%28-y-1%29-y=-11
.
Simplify by combining like terms.
-2y-1=-11
-2y=-10
y=5
.
Substitute 5 for y in the first equation.
x=-y-1
x=-%285%29-1
