I need serious help with these series of questions... My math teacher won't help me.

- anonymous

I need serious help with these series of questions... My math teacher won't help me.

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- katieb

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- anonymous

http://i1341.photobucket.com/albums/o749/whalexnuker/untitled_zps80b97cb0.png
I'm not looking for a direct answer (although I'll take one) so you can't report me or do whatever saying I'm going against the rules. I'm only asking for an explanation and help

- terenzreignz

Some math teacher...

- anonymous

@terenzreignz Ikr? :| My real math teacher is out of office and his sub won't help me either. All she said was "there's an attachment and that's what you submit" Well, okay, I already KNOW that. I don't understand the attachment.

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## More answers

- terenzreignz

Okay, let's have a look at Splott's first, shall we?

- terenzreignz

2x + 4 = -3x + 14

- terenzreignz

Obviously, there can be nothing wrong with that^ step since it's what's given...

- anonymous

Both of them start like that- I have to figure out which step from each is solved correctly and I don't know how to solve it... I tried going to wolframalpha and all that but no luck

- anonymous

solved incorrectly* like, which steps are wrong

- terenzreignz

Wolfie can't help you... all wolfie can do is give you the correct answer.

- terenzreignz

For now, this is something only a human (and apparently, not a martian) can do.
So let's get started ^_^

- anonymous

No, that site can give me step by step

- anonymous

thanks- I appreciate your time out

- terenzreignz

If that site can give it to you step by step... what's the problem?

- terenzreignz

Okay, anyway, let's look at the second step, which follows from the first...
2x + 4 + 3x = -3x + 14 + 3x
anything wrong with this step?

- anonymous

@terenzreignz I said the site /*CAN*/ give me step by step. The option is there but, obviously, i can't get step by step.
I don't know. I said I didn't know how to solve it.

- dan815

lol

- terenzreignz

Okay... calm down. I asked you a question about that second step...

- anonymous

I'm not upset or anything ._. I am calm. I know which step you asked the question on and, again, I don't know how to solve the original problem so how am I supposed to know

- terenzreignz

From knowledge of the addition property of equality, I suppose.
For any numbers a, b, and c, if
a = b
then
a + c = b + c

- anonymous

I'll be real with you, take me for a dummy. Math is NOT my best subject at all. It's very confusing. Speak each step to me, please. e_e

- terenzreignz

Basically, you are allowed to add the same number to both sides of an equation.
Which is exactly what occured in
\[\Large 2x + 4 = -3x + 14\]\[\Large 2x +4\color{red}{+3x}= -3x + 14 \color{red}{+3x}\]

- anonymous

Okay, that's in splott's but not fizzle's

- terenzreignz

We're only looking at Splott's for now.
So, since what Splott did in the second step is add the same number to both sides of the equation, then that step is valid, okay? ^_^

- anonymous

Oh, okay.
That's his first step aside from the original equation. I understand that step is correct

- terenzreignz

Okay, the third step...
\[\Large 2x + 4 + 3x = -3x+14 + 3x\]\[\Large \color{red}{5x}+4=14\]

- terenzreignz

See what Splott did there?

- anonymous

To the left side of the equal side, he/she/it added 3x+2x=5x and the 3x on the right side of the equal sign cancels out so the 14 is left

- terenzreignz

Good.
So, was it a legit step? ^_^

- anonymous

The next step? I think it would be subtracting 4 from each side so 5x = 10?

- terenzreignz

It should be... but I don't think Splott *subtracted* 4... do you?
It looks more like he/she/it actually *added* 4 to both sides...

- anonymous

yeah, he added it which messes up the rest of his work. from 5x=10... i get confused on having to either get rid of x or getting x by its self... is it -5 from each side?

- terenzreignz

To be fair to Splott, adding 4 to both sides doesn't make the equation wrong...
but it doesn't help in solving it neither.
\[\Large 5x + 4 \color{red}{+4}= 14\color{red}{+4}\]

- terenzreignz

The problem is the step AFTER that one... notice how the 4+4 on the left side became zero...

- dan815

|dw:1378215813887:dw|

- terenzreignz

\[\Large 5x = 18 \qquad \huge \color{red}{\times }\]

- anonymous

Do you mind? @dan815
@terenzreignz how is adding 4 correct when subtracting 4 is correct?

- terenzreignz

I didn't say it was the correct step, I just meant that that step doesn't harm the solving process... it's more like it doesn't help.

- anonymous

i suppose i get what you're saying but subtracting 4 is correct because of the answer outcome

- terenzreignz

What really threw it off was when 4+4 became zero in the step AFTER that faulty one.

- anonymous

What? The answer it gives doesn't make sense. According to splott, it comes out to 5x + 8 = 18

- terenzreignz

Yes... and if you subtract 8 from both sides...
5x + 8 - 8 = 18 - 8
5x = 10
x = 2
You still get the correct answer.

- terenzreignz

As long as you make NO invalid step, you'll *eventually* arrive at the answer, though not always in the most efficient manner.

- anonymous

BUT, splott didn't solve it as 5x+8=18. he says 5x=18

- anonymous

which yours says 5x=10, not 18

- anonymous

Okay, well, I'm in the 10th grade and I need to follow the instructions given. Not "you will eventually get the answer your'e looking for:"

- terenzreignz

Like I said.... Splott's real and ultimate mistake is simplifying
5x + 4 + 4 into just 5x.

- anonymous

._. So, what was stated probably almost five minutes ago..... the CORRECT way is subtracting 4

- terenzreignz

Sure...it would be the best way.

- anonymous

Alright... it looks like fizzle has another way to solve it?

- terenzreignz

Yes... and it didn't get the correct answer neither.
Mull over its steps and identify the error.

- anonymous

just as i/we did splott's? The first step is incorrect but I don't think they want me to solve it the same way I did splott. I think they want each person's steps to be different. otherwise, they would have only given me one set of steps to solve

- terenzreignz

-.- the question says "Examine the work of Splott and Fizzle. Identify any errors in the Martians' calculations... " etc.
All that says... examine them both.

- anonymous

If you're not willing to help me on MY problem the way I WANT it to be solved (because the way I'm thinking only makes sense and if I get it wrong, it won't be that hard to solve according to the first set of steps) then thanks for what you've done (I already knew). Why would they give me two set of steps to solve the same way? Hardly any work is put into that when I can just take it from the first step.

- terenzreignz

I am willing. But you need to be more open-minded.
As to why they'd give you two sets of steps to solve in the same way, I don't know, you better ask your instructor. Don't blame me, that's exactly what your question instructs you to do.

- anonymous

I don't know how you expect me to ask my teacher when I said in the beginning that she won't help as my original teacher is out of office and hasn't had contact with me for a few weeks.
I have a yahoo answers tab that says "in Fizzle's 6th row there is addition of 5 instead of 5x which leads to an incorrect final row." so.... That isn't solving each set of steps the same way

- terenzreignz

The sixth row does indeed contain an incorrect step.
And so does the fifth.

- anonymous

According to your explanation in the beginning as to solving each set of steps the same, fizzle's first step is incorrect because he subtracts 2 instead of 3

- terenzreignz

I don't recall saying anything of the sort.

- terenzreignz

And anyway, it's 2x that it subtracted, not 2.
Which is legit, it's to get rid of the 2x on the left side.

- anonymous

"As to why they'd give you two sets of steps to solve in the same way, I don't know, you better ask your instructor. Don't blame me, that's exactly what your question instructs you to do."
You're being too difficult. I don't need your "help" anymore. Thanks but no thanks.

- terenzreignz

Right then. Good luck.
@dan815 ?

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