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missing number

missing number

Fill in the missing number to make the sentence true.

-2 + 5 - n = 9

What are all the steps required to get the answer?

Since StudyWorks doesn't show the intermediate steps in solving an equation, this has to be done by hand. I'll show my work below:

-2 + 5 - n = 9

3 - n = 9 (combining the -2 and the 5)

3 - 3 - n = 9 - 3 (subtracting 3 from both sides, all to try to isolate n!)

0 - n = 6 (simplifying)

- n = 6 (now multiply both sides by -1)

n = -6

Let's check and make sure that this answer makes sense.

-2 + 5 - (-6) = -2 + 5 + 6 =
-2 + 11 = 9

which looks OK.




6 REPLIES 6
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missing number

You got the answer, and that's how you do it.
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missing number

confusing
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Denisse,

That looks clear to me if you do the addition and subtraction in each line.

Try doing the arithmetic on each step. What do you find confusing?

Write back and I'll see if I can help, but don't just look at it, try to do each step yourself.

Mona
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I need help with some problems!

1) 5-6x==11+2x

2) 4-(-7x)=13-6x

3) 8x+5=5x-13

4) 1-10x=-2x=35

thanx for all your help!
=ethanpestana=
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On 10/23/2007 12:19:12 AM, ethanpestana wrote:
>I need help with some
>problems!
>
>1) 5-6x==11+2x
>
>2) 4-(-7x)=13-6x
>
>3) 8x+5=5x-13
>
>4) 1-10x=-2x=35
>
>thanx for all your help!
>=ethanpestana=

Start by collecting terms. All those involving x need to collected on one side and all those that don't need to be collected on the other side of the equal sign.

In the first one, you can start by adding 6x to both sides.

TTFN,
Eden
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missing number

See the example that arbitrary student posted above. Whatever you do to one side of an equation you have to do to the other side.

So subtract or add something to both sides.
Or multiply or divide something to both sides.

When you are done, take the value you found for x and plug it back in the original equation to see if it is true. That is your check.

Mona
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