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ValentinaT
Group Title
Using substitution, could someone please help me with this system?
–y + 3x = 6
y = –6x + 12
So far I've gotten:
Substituting the second equation into the first you get
(6x+12) + 3x = 6
Which can be solved for x after finding x you can use the second equation above directly to find y
 one year ago
 one year ago
ValentinaT Group Title
Using substitution, could someone please help me with this system? –y + 3x = 6 y = –6x + 12 So far I've gotten: Substituting the second equation into the first you get (6x+12) + 3x = 6 Which can be solved for x after finding x you can use the second equation above directly to find y
 one year ago
 one year ago

This Question is Closed

MathDad72 Group TitleBest ResponseYou've already chosen the best response.1
Sounds like you know what you are doing .... What's the problem you are having?
 one year ago

ValentinaT Group TitleBest ResponseYou've already chosen the best response.1
Well, I had help with that part, but I can't figure out what to do next. I tried using my textbook, but it was a bit confusing, because they showed you what to do, but didn't explain it.
 one year ago

MathDad72 Group TitleBest ResponseYou've already chosen the best response.1
Ok, first let's distribute that (6x+12) Can you do that?
 one year ago

ValentinaT Group TitleBest ResponseYou've already chosen the best response.1
6x + 72?
 one year ago

MathDad72 Group TitleBest ResponseYou've already chosen the best response.1
Think of it this way: ()(6x) & ()(12)
 one year ago

ValentinaT Group TitleBest ResponseYou've already chosen the best response.1
Because negative times negative equals a positive 6x + 12?
 one year ago

MathDad72 Group TitleBest ResponseYou've already chosen the best response.1
yes, very good so we have 6x12+3x=6 What will you do next?
 one year ago

ValentinaT Group TitleBest ResponseYou've already chosen the best response.1
Add 6x and 3x?
 one year ago

MathDad72 Group TitleBest ResponseYou've already chosen the best response.1
correct 9x12=6 now what?
 one year ago

ValentinaT Group TitleBest ResponseYou've already chosen the best response.1
Substitute for y from the other equation?
 one year ago

MathDad72 Group TitleBest ResponseYou've already chosen the best response.1
Let's try to solve for x.
 one year ago

ValentinaT Group TitleBest ResponseYou've already chosen the best response.1
Sorry, I was looking at my textbook, and thought that we were onto that step.
 one year ago

MathDad72 Group TitleBest ResponseYou've already chosen the best response.1
:) That's ok.
 one year ago

ValentinaT Group TitleBest ResponseYou've already chosen the best response.1
Okay, so how would I go about solving for x? Also, thank you for the medal.
 one year ago

MathDad72 Group TitleBest ResponseYou've already chosen the best response.1
We have x on one side, can we get non xvalues on the other side?
 one year ago

ValentinaT Group TitleBest ResponseYou've already chosen the best response.1
You would add 12 + 6? Then get 18, divided by 9x would equal 2.
 one year ago

MathDad72 Group TitleBest ResponseYou've already chosen the best response.1
Excellent: So x=2
 one year ago

MathDad72 Group TitleBest ResponseYou've already chosen the best response.1
What are you going to do with that x=2?
 one year ago

MathDad72 Group TitleBest ResponseYou've already chosen the best response.1
You still there?
 one year ago

ValentinaT Group TitleBest ResponseYou've already chosen the best response.1
Substitute 2 for x in either equation and solve for y? Sorry, my computer is slow sometimes.
 one year ago

MathDad72 Group TitleBest ResponseYou've already chosen the best response.1
Heh I Understand. You are correct, good job!
 one year ago

ValentinaT Group TitleBest ResponseYou've already chosen the best response.1
Thank you! So, y + 3(2) + 6.
 one year ago

MathDad72 Group TitleBest ResponseYou've already chosen the best response.1
y+3(2)=6
 one year ago

ValentinaT Group TitleBest ResponseYou've already chosen the best response.1
So, y + 6 = 6.
 one year ago

ValentinaT Group TitleBest ResponseYou've already chosen the best response.1
What would I do next?
 one year ago

MathDad72 Group TitleBest ResponseYou've already chosen the best response.1
same that you did when you had 9x12=6 and solved for x. now we are going to it for y
 one year ago

ValentinaT Group TitleBest ResponseYou've already chosen the best response.1
6  6 = 0 So y, would be 0?
 one year ago

MathDad72 Group TitleBest ResponseYou've already chosen the best response.1
That is correct.
 one year ago

ValentinaT Group TitleBest ResponseYou've already chosen the best response.1
Then I would substitute 0for y, and get 0 + 6 = 6.
 one year ago

MathDad72 Group TitleBest ResponseYou've already chosen the best response.1
Correct: So your Answer is: X=2, y=0
 one year ago

MathDad72 Group TitleBest ResponseYou've already chosen the best response.1
As long as you get a correct statement when you plug them both back in, like you showed 6=6 and not get something like 7=6, then we would have a problem.
 one year ago

ValentinaT Group TitleBest ResponseYou've already chosen the best response.1
Okay, thank you some much for your help. If I could give you more than one medal I would.
 one year ago

MathDad72 Group TitleBest ResponseYou've already chosen the best response.1
Thank you, It is nice to meet someone who wants to work out the problems and not just demand an answer.
 one year ago

ValentinaT Group TitleBest ResponseYou've already chosen the best response.1
I get what you mean, you are a very good teacher by the way.
 one year ago
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