Question

Please Help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!



Solve these equations using the addition property.

x - y = 4
x + y = 8

The lines intersect at ( __, __ )

Answer 1

im going to poop in your mouth

Answer 2

you need to delete your comment^

Answer 3

im going to poop in your mouth, twice

Answer 4

Ohhh, how I hated these. Solve for x and y to find an intersection. Pick an equation, any equation.

We'll start with x-y=4. Solve for x.

x=y+4.

Andd, now you're stuck. So, temporarily take that as the value of y. x-4.

Now plug that into your other equation for y.

x+y=8.
y+ (4+y)=8

Solve for y.

2y+4=8

2y=4.

y=2.

That is your permanent solution for y.

Now you can solve for x. *The real x, not the temporary one we just used. Forget about that completely. Fun, isn't it?* We'll use the last equation again.

2+x=8.

x=6.

So, y= 2 and x=6. At the point where your equations equal the same on both sides, there is an intersection. 6+2=8? Yes. 6-2=4? Yes. So there's an intersection at (6,2).

If that isn't right, I blame Calc II.