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Mathematics 13 Online
OpenStudy (anonymous):

algebra

OpenStudy (anonymous):

OpenStudy (anonymous):

y=5/3x+8

OpenStudy (whpalmer4):

Okay, \[y+2 = \frac{5}{3}(x+6)\]You want \[?x + ?y = ?\] Any ideas how to start?

OpenStudy (anonymous):

x=3y5−245

OpenStudy (anonymous):

y=8+5x/3

OpenStudy (whpalmer4):

Why don't we get rid of that fraction first? Multiply everything by the denominator of the fraction: \[3*y + 3*2 = 3*\frac{5}{3}(x+6)\]\[3y + 6= 5(x+6)\] Can you rearrange that so that the \(x\) and \(y\) terms are on the left, and anything else on the right?

OpenStudy (anonymous):

y=5/3x+8

OpenStudy (whpalmer4):

Why do you keep typing that stuff?

OpenStudy (whpalmer4):

Do you know what the distributive property is?

OpenStudy (anonymous):

im lost

OpenStudy (whpalmer4):

Do you know what the distributive property is? \[a(b+c) = a*b + a*c\] it's how you get rid of parentheses like we have in \[3y+6=5(x+6)\] Can you use it to get rid of the parentheses, please?

OpenStudy (anonymous):

y=13 x

OpenStudy (whpalmer4):

Come on...you had \[3y+6 = 5(x+6)\]and you are telling me that becomes \(y = 13x\) I want you to do just one simple step: use the distributive property to remove the parentheses. Do not simplify, do not collect like terms, leave everything there exactly as it is if you do only that one step.

OpenStudy (anonymous):

3y+6=5x+6

OpenStudy (whpalmer4):

Well, closer, but no. \[5(x+6) = 5*x + 5*6 = 5x + 30\] So, \[3y + 6 = 5(x+6)\]\[3y+6 = 5*x + 5*6\]\[3y+6 = 5x +30\] Now, can you rearrange that so that the terms with \(x\) and \(y\) in them are on the left-hand side, and the terms with only numbers are on the right-hand side?

OpenStudy (anonymous):

OpenStudy (anonymous):

?????

OpenStudy (whpalmer4):

Please do what I ask. We'll save a lot of time if you do that. \[3y+6 = 5x+30\]Rearrange that so that you have an equation with the terms containing \(x\) or \(y\) on the left side of the = and any terms not containing one of them on the right side of the =.

OpenStudy (whpalmer4):

Let's look at the first term: \(3y\) Do we want that on the left-hand side or the right-hand side?

OpenStudy (anonymous):

+30 its wrong

OpenStudy (md152727):

OpenStudy (md152727):

please medal as I spent lots of time in this

OpenStudy (whpalmer4):

@MD152727 that is NOT what the problem asks you to do.

OpenStudy (whpalmer4):

problem wants the equation in standard form: \[Ax + By = C\]

OpenStudy (md152727):

:? *facepalm*

OpenStudy (whpalmer4):

Yeah, I know the feeling :-)

OpenStudy (md152727):

My gosh!

OpenStudy (whpalmer4):

Helpful tip that has saved me countless times over the years: when you think you have an answer, check your work. When you have checked and are sure that you didn't make a stupid mistake somewhere, re-read the problem and make sure you have answered the question asked by the problem, and not some other question.

OpenStudy (md152727):

That is what I understood! I am an 11 years old in 9th grade

OpenStudy (anonymous):

I'm still not get the problem solve

OpenStudy (md152727):

ok, sorry ignore me, i annoyed you two

OpenStudy (anonymous):

??

OpenStudy (whpalmer4):

Perhaps if you did as I requested, @EKKERKING, we could be done... I will ask again: the term \(3y\), do we want to keep it on the left side or move it to the right side?

OpenStudy (anonymous):

move it

OpenStudy (whpalmer4):

Let me remind you of my instructions: Rearrange that so that you have an equation with the terms containing x or y on the left side of the = and any terms not containing one of them on the right side of the =. Do we want to move \(3y\) to the right side, or keep it on the left side?

OpenStudy (anonymous):

leave it like that

OpenStudy (whpalmer4):

Excellent! That's correct. Here's what we have so far, just so we can see it: \[3y + 6=5x+30\]We decided that the \(3y\) stays on the left. How about the \(+6\), keep on the left, or move to the right?

OpenStudy (anonymous):

move it to the right

OpenStudy (whpalmer4):

Very good. How do we do that?

OpenStudy (anonymous):

3y+5x=6+30

OpenStudy (whpalmer4):

No, I asked "how?" \[3y+6 = 5x+30\]If we to move that \(+6\) out of the left-hand side, we must subtract it from both sides. \[3y+6 -6 = 5x + 30 -6\]\[3y = 5x + 24\] Any question about that?

OpenStudy (anonymous):

bro I'm only missing 1 number

OpenStudy (anonymous):

OpenStudy (whpalmer4):

Do you understand what I did there?

OpenStudy (anonymous):

no

OpenStudy (whpalmer4):

What grade are you in?

OpenStudy (anonymous):

7

OpenStudy (anonymous):

help me with that number please

OpenStudy (whpalmer4):

Just curious. \[3y + 6 = 5x + 30\]You can do anything you want, pretty much, as long as you do it to both sides of the equation. We have a \(+6\) on the left side, but we don't want it there. To get rid of it, we subtract \(6\) because \(+6 - 6 = 0\). But to subtract it from the left side, we also need to subtract it from the right side or we won't have a true equation any longer. \[3y + 6 - 6 = 5x + 30 -6\]\[3y +\cancel{6 - 6} = 5x + 30 - 6\]\[3y = 5x + 30 - 6\]But \(30-6 = 24\) so we can simplify the right hand side as well: \[3y = 5x +24\]

OpenStudy (whpalmer4):

Now, how about that \(5x\) term: keep it where it is, or move it to the left side?

OpenStudy (anonymous):

it was -24 thanks buddy

OpenStudy (whpalmer4):

Good luck!

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