anonymous
  • anonymous
Solve for Y. 3x+7y = 6x+1 If anyone could guide me, that would help so much. Thanks
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
Possible answers: y=3x+9 y=7x-1/3 y=3x+1/7 y=9x+1/7
GoldPhenoix
  • GoldPhenoix
You want 7y by itself. So you want to get rid of 3x. So, (3x + 7y) - 3x = 7y Now, if you subtract 3x on one side of the equation, then you must do it to the other side of the equation. (6x + 1) - 3x = ?
anonymous
  • anonymous
I got 7y = 3x+1. Is that incorrect?

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GoldPhenoix
  • GoldPhenoix
No. That is correct. :) Alright, now you want just y, not 7y. So what do you think you have to do? Here's a hint: 7y is a coefficient. So another way of writing 7y is 7 * y.
anonymous
  • anonymous
Would you divide by Y?
anonymous
  • anonymous
Like, put 7/y
GoldPhenoix
  • GoldPhenoix
Hmm. Well, 7y / y = 7. Since 7y can be represented as 7 * y. So 7 * y / y = 7. Make sense? You want y, not 7. So what else do you think you have to do?
GoldPhenoix
  • GoldPhenoix
Our equation looks like, 7y = 3x + 1. If that helps. >_>
anonymous
  • anonymous
Divide 7y by 7?
GoldPhenoix
  • GoldPhenoix
Good! Now if you divide 7 on one side of the equation, then you must do it on the other side of the equation. Do you see the answer?
anonymous
  • anonymous
3x+1/7? :)
GoldPhenoix
  • GoldPhenoix
Great! I hope this help. :)
anonymous
  • anonymous
It does! I have one more :)
anonymous
  • anonymous
Do you think you can help?
GoldPhenoix
  • GoldPhenoix
Alright. :)
anonymous
  • anonymous
5(3ax+y)=8ax, -3y for x
GoldPhenoix
  • GoldPhenoix
So, -3y = x ? Sorry, just making sure.
anonymous
  • anonymous
I believe so. My paper didn't have a comma after the 8ax, but Ill assume that's what it is.
anonymous
  • anonymous
There are also some possible answers if this helps: -8y/-23a -8y/-7a -4y/-7a 2y/7a
GoldPhenoix
  • GoldPhenoix
Let me think for a moment. >_> Gonna check if my answer are correct.
anonymous
  • anonymous
No problem..
GoldPhenoix
  • GoldPhenoix
Did the paper say, 5(3ax+y)=8ax -3y for x something like that?
anonymous
  • anonymous
Yes exactly
GoldPhenoix
  • GoldPhenoix
Substituting didn't work, I guess that means multiplication. Give me 1m minute.
anonymous
  • anonymous
Okay Thanks.
GoldPhenoix
  • GoldPhenoix
I think I know the answer. Its written as 5(3ax+y)=8ax -3y for x Subtract 3y, not comma. >_>
GoldPhenoix
  • GoldPhenoix
Anyway, distribute. 5(3ax+y) You know how to do the distributive property?
anonymous
  • anonymous
15ax+5y
GoldPhenoix
  • GoldPhenoix
Good. Now the equation looks like, 15ax + 5y = 8ax - 3y Combine like terms. Do you know how to do that?
GoldPhenoix
  • GoldPhenoix
Or simplify. >_>
anonymous
  • anonymous
7ax+8y?
GoldPhenoix
  • GoldPhenoix
Hmm. Well, you know that you can subtract 8ax to both side of the equation to get, 7ax + 5y = -3y Now you want 5y on the right side of the equation. Do you know how to do that?
anonymous
  • anonymous
Ok, ok. subtract 5y to make -8y?
GoldPhenoix
  • GoldPhenoix
Yep. 7ax = -8y Now you want x. So what do have to do?
anonymous
  • anonymous
Multiply it by 1?
GoldPhenoix
  • GoldPhenoix
If you do, then the equation would still be the same. Here's a tip: 7ax can be written as 7 * a * x So your equation can look like: 7 * a *x = -8 * y You want x. So you have to do something about 7 * a .
anonymous
  • anonymous
put it under 8y?
GoldPhenoix
  • GoldPhenoix
Hmm. Put what under 8y?
anonymous
  • anonymous
7a
GoldPhenoix
  • GoldPhenoix
Great. I think you found your answer.
anonymous
  • anonymous
Thank you so much. Seriously. You dont know how much I appreciate it. I have to take a College Placement Test and needed help on a few of these, I didn;t understand,
GoldPhenoix
  • GoldPhenoix
Yeah, no problem. :)

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