Question

I don't understand how to do this at all.. Please help?
y=6-x and y=x-2

a (2,4)
b (-4,2)
c (4,2)
d no solution

Answer 1

lets find y first:

y=6-x

we need to know x to get y, which we can get from our second equation y=x-2

solve y=x-2 for x

Answer 2

y=6-x ... start with the first equation

x-2=6-x ... replace y with x-2 (since y = x-2)

now solve for x

Answer 3

I'm so confused

Answer 4

Do you see how I got to x-2=6-x ?

Answer 5

yea...

Answer 6

the goal now is to solve for x (ie isolate x)

Answer 7

get x all by itself on one side

Answer 8

Okay...

Answer 9

We have two equations and two missing variables, x and y.

y=6-x
y=x-2

as you can see, y equals both 6-x, and x-2. That means we can do this:

6-x=x-2

now we only have 1 variable to solve for! This means that we can find out the actual value of x.

do you know how to solve 6-x=x-2 for x?

Answer 10

I have no clue on where to start... haha I'm sorry.. I've been trying to figure this out all day... :/