Question

im sorry I need a little help and it looks a lot like hollagirl24's. Because strangely where working on the same test.
So here it is
y=-x-7
y=2/3x+8

Answer 1

System of equation?

Answer 2

yeah

Answer 3

Do you know the first step?

Answer 4

no can you in numbers show me how to get the 1st step. Please I really need the help.

Answer 5

y=-x-7
y=2/3x+8

So we're given two equation. You can both see they're solved for y, correct?
So, doesn't that mean you can plug in numbers for y since you know what y is?

In other words, if I had:
x = 2
x = 2, you see, I already know that x = 1, so I can plug 1 into the other equation and say

2 = 2, which is a true statement

Answer 6

Does that make sense?

Answer 7

a little yeah were you trying to solve the x

Answer 8

Yes. Let me give you another example

y = x + 2
y = x + 3

So, I know what y equals so I can plug it in

x + 2 = x + 3
You get what I'm doing?

Answer 9

Okay I get so x=2

Answer 10

Huh, did you just solve your original equation?

Answer 11

what do you mean?

Answer 12

\[-x-7 = \frac{ 2 }{ 3 }x + 8\]

Answer 13

That's the first step. Now I want you to think about what I just did and why it makes sense.

For example:
y = 2x + 2
y = 2x + 1

You see. I KNOW y is equal to 2x + 2, so I can SUBSTITUTE the top equation into the bottom one

2x + 2 = 2x + 1

Answer 14

Ready to move on to step 2?

Answer 15

yes

Answer 16

The next part is simplifying the expression.

\[-x-7 = \frac{ 2 }{ 3 }x + 8 \rightarrow -x + x = \frac{ 2 }{ 3 } + 7 + 8 \rightarrow x = \frac{ 2 }{ 3 } + 15\]

Can you add the last part, that is: \[ x = \frac{ 2 }{ 3 } + 15\]

Answer 17

okay can you show me this using e problem that I sent in, You don't have to cheat. Just follow the steps to the problem leading to the answer without giving me the answer

Answer 18

This IS the problem you posted...

Answer 19

h

Answer 20

I mean ok you can keep going

Answer 21

(-9, 2)

There, I just solved it for you.