anonymous
  • anonymous
Solve 9c + 4 = -23.
Mathematics
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anonymous
  • anonymous
Solve 9c + 4 = -23.
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
what is 13-23
anonymous
  • anonymous
10
anonymous
  • anonymous
-3 3 -2.1 4

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Goose.
  • Goose.
Where did you get 13-23?
Goose.
  • Goose.
@lauren.ascough
Goose.
  • Goose.
For this you need to isolate your variable (c)
Goose.
  • Goose.
So first, you would subtract 4 from both sides.
Goose.
  • Goose.
So you would have 9c = -27
Goose.
  • Goose.
Then divide both sides by 9.
anonymous
  • anonymous
3
Goose.
  • Goose.
A positive number divided by a negative number is a negative number.
anonymous
  • anonymous
@goose i ask you another question
Goose.
  • Goose.
Sure,
anonymous
  • anonymous
Solve 3x - x + 2 = 12
Goose.
  • Goose.
Combine like terms first, so 3x - 1x is 2x, solve from there, 2x + 2 = 12. subtract 2 from both sides, you have 2x = 10.
Goose.
  • Goose.
You want base value of x, so divide both sides by 2.
anonymous
  • anonymous
5
Goose.
  • Goose.
Yup! :)
anonymous
  • anonymous
@goose i still don't understand to do it by myself
anonymous
  • anonymous
Solve 4(x + 1) + 8 = 24.
anonymous
  • anonymous
like can you help me
Goose.
  • Goose.
Okay, you know how to distribute right?
anonymous
  • anonymous
mmmmm
Goose.
  • Goose.
Well Distribute your 4 to each number in the parentheses, give me your new equation, I'll do my best to teach you from there.
anonymous
  • anonymous
so its 4x + 5
anonymous
  • anonymous
in the parenthesis
Goose.
  • Goose.
No, you wouldn't add 4 to the +1, you'd multiply, and 4 x 1 is 4.
anonymous
  • anonymous
why
Goose.
  • Goose.
But either way, we now have 4x + 4 + 8 = 24
Goose.
  • Goose.
When distributing, you're multiplying by the outside term,
anonymous
  • anonymous
ok
Goose.
  • Goose.
So you just take your numbers one at a time, 4 x 1x and 4 x 1
anonymous
  • anonymous
but it will give you 16x = 24
Goose.
  • Goose.
No, you don't add them up, this is probably the part that confuses you.
Goose.
  • Goose.
So, we need to do the opposite of each other term.
Goose.
  • Goose.
4x + 4 + 8 = 24, we need to get rid of the 8, so we can Subtract 8 from both sides.
anonymous
  • anonymous
4x + 4 = 24
anonymous
  • anonymous
we get rid of the x
Goose.
  • Goose.
4x + 4 + (8 - 8) = 24 - 8
Goose.
  • Goose.
No, the x is the thing we want to keep, we get rid of everything elseon it's side.
Goose.
  • Goose.
Let's make this a step easier, 4x + 12 = 24.
Goose.
  • Goose.
If you want to get rid of 12, so you just have 4x what would you do?
anonymous
  • anonymous
add
Goose.
  • Goose.
And remember what ever you do to one side, you do to the other.
Goose.
  • Goose.
I don't think so, if you added it would make the 12 go up. we want it to go down to 0.
anonymous
  • anonymous
c = -3
Goose.
  • Goose.
That's actually incorrect.
anonymous
  • anonymous
subtract
Goose.
  • Goose.
Yes, what would you subtract though?
Goose.
  • Goose.
If you want 12 to be 0, and remember you do it to both sides.
anonymous
  • anonymous
4x - 12 = 24 24/8 = 3 the answer is 3
Goose.
  • Goose.
The answer is 3, but why did you do what you just did?
anonymous
  • anonymous
9c+4=-23 9c=-23-4 9c=-27 9c/9= -27/9 remain the C devide it by 9 c= -3
Goose.
  • Goose.
You should of subtracted 12, from both sides which got you too 4x = 12
Goose.
  • Goose.
Then divide both sides by 4.
Goose.
  • Goose.
So you would get x=3
Goose.
  • Goose.
We already solved those problems at the top.
anonymous
  • anonymous
like i subtracted 4 - 12 it gives you 8
anonymous
  • anonymous
then i divided 8 into 24
anonymous
  • anonymous
and it gave me 3
Goose.
  • Goose.
That's not always going to happen, you don't want to do that... You already had +12. you would do -12 to make it 0.
anonymous
  • anonymous
ok
anonymous
  • anonymous
just to know if i understand
anonymous
  • anonymous
Solve y over negative 2 + 5 = 13.
anonymous
  • anonymous
its -36 right
Goose.
  • Goose.
No.
Goose.
  • Goose.
You did everything right except for one step, you added 5 to each side instead of subtracted 5 to each side.
Goose.
  • Goose.
If you have + something or - something you want to do the Opposite.
Goose.
  • Goose.
Try it again, using what I just told you.
anonymous
  • anonymous
scant get it
anonymous
  • anonymous
i can't get it

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