Use the Substitution method to solve the system of equations. x + y = -4 x - y = 2

Question

anonymous · Answer

Can you write a little more clearly? I think your equations are..
x+y=-4
x-y=2

well in order to use substitution we have to solve for a variable in one of the equations. Thus, isolating that variable. We can solve for x in equation 2 and get x=2+y

We now plug this into the first equation for x

2+y+y=-4

2y=-6
y=-3

Now that you have y, plug it into the equation for x=2+y and solve for x

anonymous · Answer

how do you solve for x?

anonymous · Answer

well y=-3.. and we have an equation that says 2+y=x so we replace y=-3 and solve

anonymous · Answer

x+y = -4
x+(-3) = -4
x-3 = -4
x = -1

anonymous · Answer

thanks