Answer:
x is equal to -2, and y is equal to 2.
Step-by-step explanation:
You can solve this type of question by solving one of the equations for a given variable, and substituting it into another.
Because both of these are definitions of y, we could simply say, y = y, and thus:
x + 4 = -2x - 2
3x = -6
x = -2
This tells us also that y, being equal to x + 4, must equal 2
We can find the same solution by solving one of them for x, then substituting that into the other. We know:
y = x + 4
so we can also say:
x = y - 4
If we substitute that into the other:
y = -2x - 2
y = -2(y - 4) - 2
y = -2y + 8 -2
3y = 6
y = 2
which we can then plug into either of the original equations to solve for x:
y = x + 4
2 = x + 4
x = -2
