Question

What is the additive inverse of x + 4 = -9

Answer 1

We need to isolate the variable, so take off that 4 by subtracting it by both sides.

Answer 2

Then?

Answer 3

Well then you get your answer! So subtract 4 :)

Answer 4

x + 4 = -9
- 4 -4

Answer 5

I was out for this problem in class thanks

Answer 6

No problem! Can I haz a medal for helping you :3

Answer 7

Wait what about 21 + x = 14? Same thing? :o

Answer 8

Yupp, 21 is positive so the only way to undo something is to do the opposite which is subtract 21 from both sides :)

Answer 9

Multiplicative inverse? /.\

Answer 10

I don't know the technical term but I guess yes :/

Answer 11

No idk that one either, 2/3x=24?

Answer 12

Well you need to clear the denominator so you would multiply BOTH sides by 3

Answer 13

Answer would be 72? /.\

Answer 14

So you get 2x = 72

Answer 15

No remember you need x by itself

Answer 16

S how do you undo 2x which is multiplication? (2 * x)

Answer 17

Opposite of multiplication = ?

Answer 18

So its 36

Answer 19

Im sorry, -8 = x/2 im so confused

Answer 20

Yes! 72 divided by 2 = 36 :D

so you get x = 36

Answer 21

Ok so let me do this, I will only help you when you need it, you will be in charge of doing it, that way you practice, so do you know how to start it?

Answer 22

No

Answer 23

Remember your primary goal is to get x by itself

Answer 24

Im so confused

Answer 25

Ok to get x by itself you need to take out that 2 so how do we do this?

Answer 26

This is hurting my head idk take it away? Subtract

Answer 27

X/2 Is division, the only way to undo a division problem is to do the opposite...multiplication! so multiply 2 by both sides to cancel out that pesky 2 :D

Answer 28

-16=x? /.\

Answer 29

Yes!

Answer 30

You got it :D

Answer 31

Do you understand any of this or still lost?

Answer 32

X - (-9) = 12 i know how to do this i just don't know what to do with the -9

Answer 33

I understand if i see it once

Answer 34

Ok so - (-9) here we see that 9 is already a negative, so by putting that other - in front of it we can make it 9 because those - cancel out

Answer 35

So you get

X + 9 = 12

Answer 36

-x = 30? Is it -30?

Answer 37

Not quite, remember 9 is positive so you have to subtract it from both sides.

Answer 38

Thats what i did

Answer 39

12 - 9 = 30?

Answer 40

This is a completely different problem.-.

Answer 41

Yes but I am showing you that 12 - 9 is not 30, so you did the problem wrong :)

Answer 42

Omg! I finished tht problem now i moved on, so im confuse on -x = 30

Answer 43

OHHHHHHHHHHHHH I get it now haha

Answer 44

Yeah

Answer 45

Hmmm... ok I am stumped on this one, I know you need to take out that - sign but I dunno how :/

Answer 46

Dubblebarrel please only have one question per thread, and it would be kind to give Meowz a medal for helping you. Thanks all.

Answer 47

Devise by -x i remember

Answer 48

How do i do that?

Answer 49

"Best Response" Button, it's blue, it should be there ---------->

Answer 50

And what she also means is to close this question and make a new one.

Answer 51

Its not :o

Answer 52

I just said its not there

Answer 53

It doesn't show up for me because it's my own question but it should show up for you by MY post :)

Answer 54

I just said it is not there

Answer 55

That's extremely weird, anyways moving on, close this question and open a new one, so you can get more help :)