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ValentinaT
 3 years ago
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
ValentinaT
 3 years ago
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

This Question is Closed

MathDad72
 3 years ago
Best ResponseYou've already chosen the best response.1Sounds like you know what you are doing .... What's the problem you are having?

ValentinaT
 3 years ago
Best ResponseYou've already chosen the best response.1Well, 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.

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

MathDad72
 3 years ago
Best ResponseYou've already chosen the best response.1Think of it this way: ()(6x) & ()(12)

ValentinaT
 3 years ago
Best ResponseYou've already chosen the best response.1Because negative times negative equals a positive 6x + 12?

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

MathDad72
 3 years ago
Best ResponseYou've already chosen the best response.1correct 9x12=6 now what?

ValentinaT
 3 years ago
Best ResponseYou've already chosen the best response.1Substitute for y from the other equation?

MathDad72
 3 years ago
Best ResponseYou've already chosen the best response.1Let's try to solve for x.

ValentinaT
 3 years ago
Best ResponseYou've already chosen the best response.1Sorry, I was looking at my textbook, and thought that we were onto that step.

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

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

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

MathDad72
 3 years ago
Best ResponseYou've already chosen the best response.1What are you going to do with that x=2?

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

MathDad72
 3 years ago
Best ResponseYou've already chosen the best response.1Heh I Understand. You are correct, good job!

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

ValentinaT
 3 years ago
Best ResponseYou've already chosen the best response.1What would I do next?

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

ValentinaT
 3 years ago
Best ResponseYou've already chosen the best response.16  6 = 0 So y, would be 0?

ValentinaT
 3 years ago
Best ResponseYou've already chosen the best response.1Then I would substitute 0for y, and get 0 + 6 = 6.

MathDad72
 3 years ago
Best ResponseYou've already chosen the best response.1Correct: So your Answer is: X=2, y=0

MathDad72
 3 years ago
Best ResponseYou've already chosen the best response.1As 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.

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

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

ValentinaT
 3 years ago
Best ResponseYou've already chosen the best response.1I get what you mean, you are a very good teacher by the way.
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