A community for students.
Here's the question you clicked on:
 0 viewing
jagr2713
 one year ago
x3y=9
6x+y=3
jagr2713
 one year ago
x3y=9 6x+y=3

This Question is Closed

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0i dont understand this @freckles

steve816
 one year ago
Best ResponseYou've already chosen the best response.0How does a 99 rated mathlete not know how to do system of equations O.o

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0Well when you haven't done math in a while u forget things.....

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.1dw:1442268783821:dw

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0ok i know the part where u add them and stuff but i just need help in the beginning. How do u find what to multiply them with?

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.1when they are set out like that, just imagine adding them and knocking out an x or a y so, let's do it again

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.1dw:1442269218613:dw

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0wait why did u use 1 and 2

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.1if you meant, the (1) and (2) in brackets to identify the equations, and just a habit is that what you were referring to?

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0Because my teacher taught me to multiply them by a number and then add then and cancel the x or y u used etc

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.1loads of ways to do these eg dw:1442269699628:dw

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.1can i ask , do you work on the OS website??

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0whats the easiest way? can u do in equation form cause the drawing is losing me

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0do i work on the website?

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.1are you part of the OS team?

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.1easiest way is substitution, IMHO. as in, it's pure method. so, from the first equation, which is \(x  3y = 9\), you can say \(x = 3y  9\) then in the second, which is \(6x + y = 3\), you can say \(6(3y  9) +y = 3\) so \(18y  54 + y = 3\) or \(19y = 57\), \(y = 3\)

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.1so you code this site?!

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0OOOHOHO you have to change the x3y=*9 in x=3y9 and lets stay relevant :D u can message me the other questions

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0But what if its x+3y=9 does 3y become positive cause u move it?

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.1if x + 3y = 9 then x = 3y  9

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.1because x+3y3y = 93y

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0so i got 6(3y9)+y=3 18y54+y=3 +y +y 19y54=3 +54 +54 19y=57 y=3

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0so now u plug it into the x too get x right? x3(3)=9 x+9=9 9 9 x=18 so we got (18,3)

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.1if you know that y = 3, plug that into one of the original equations to find x

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.1eg, if x  3y = 9 what is x if y = 3

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.1or if 6x + y = 3 what is x if y = 3??

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0you plug it into the x3y=9 right?

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.1into either, you want to know when they meet

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0it says 18,3 is wrong

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0wait don't i need another point?

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.1i thought we had agreed 0, 3 ?!?!

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0OOHOHOHO i did it wrong ok so i need another set of points to connect it.

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.1indeed you might! gtg

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.1really sorry @jagr2713 i gotta go sleep i am in europe, i guess you are somewhere else my condolensces!!!!

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0are you meant to solve by either substitution or elimination?

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0i got the answer 0,3 just need another point

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0well... where the graph of two equations meet, is where the answer is :) hm if 0,3 is the answer.... isn't that what you needed? :)

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0Yea but thats only one point need 2 for a line

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0here use this i did another question x3y=3 3x+y=1 i got (0,1)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0..is that another one?

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0Yea i just change questions i got 0,1 but need another point

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0hmmm thought you were supposed to just graph them?

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0Yea it say solve the following system of equation by graphing them

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0well... I'd just graph them then :) lemme do a quick table

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0wait do we just do the xy thing and put 0 for x and ory?

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0dw:1442273690049:dw like that?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yeap to make a line, all you need is 2 points so just pick two random "x" to get two "y"s

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0OHH so dw:1442273743049:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0hmm yes \(\begin{array}{llll} x3y=3\implies &\cfrac{x+3}{3}={\color{brown}{ y}} \\ \quad \\ 3x+y=1\implies &{\color{brown}{ y}}=13x \end{array} \\ \quad \\ \qquad \qquad \begin{array}{ccllll} x&y \\\hline\\ &\frac{x+3}{3}\\ \\\hline\\ &\frac{x+3}{3}\\ 0&1\\ 3&0 \end{array}\qquad \begin{array}{ccllll} x&y \\\hline\\ &13x \\\hline\\ 0&1\\ 4&11 \end{array}\)

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0where did u get they 3 from?

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0is this correct (0,3) (9,0) and (0,3) (2,0) ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0hmmm 0, 3 is not, 9,0 isn't either

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0x =0 x 3y=3 03y=3 y = (3)/(3) y =1

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0x3y=9 3y=9 y=1/3 x3y=9 x=9

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0x=9 (9)3y=3 3y=3+9 3y=+6 y=(6)/(3) y=2

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0wait this is confusing me dont u put 0 for them?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0wel... you said it was x3y=3 3x+y=1 but now you seem to have changed it some

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0OHOHOHO I've been doing the wrong problem... :D KML

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0I WAS LOOKING AT THE QUESTION LOL

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0i got (0,1) (3,0) and (0,1) (3,0)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0but all you need to graph a line is two points \(\begin{array}{llll} x3y=3\implies \cfrac{x+9}{3}={\color{brown}{ y}}\\ 6x+y=3\implies {\color{brown}{ y}}=36x \end{array}\) http://fooplot.com/#W3sidHlwZSI6MCwiZXEiOiIoeCs5KS8zIiwiY29sb3IiOiIjM0IxRENGIn0seyJ0eXBlIjowLCJlcSI6IjMtNngiLCJjb2xvciI6IiNENDExMTEifSx7InR5cGUiOjEwMDAsIndpbmRvdyI6WyItNi41NCIsIjYuNDYiLCItMi40OCIsIjUuNTIiXX1d

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0D: it says my answer is wrong... i did the xy thing

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0check yours PEMDAS I'd think

freckles
 one year ago
Best ResponseYou've already chosen the best response.1I'm confused... Are you saying you got 3 different solutions for x3y=3 3x+y=1 ? You should only get one solution, infinitely many solutions, or no solutions for system of linear equations.

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0OHH my friend told me to use y=mx+b

freckles
 one year ago
Best ResponseYou've already chosen the best response.1why? aren't you trying to solve the system x3y=3 3x+y=1 ? or is that not the question?

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0yes by graphing it thou but i did it and getting it wrong D:

freckles
 one year ago
Best ResponseYou've already chosen the best response.1you should just get a point for the solution of this system: you will see that when graphing these two lines that they will share a common point that point is the solution x3y=3 3y=x3 y=1/3*x+1  3x+y=1 y=3x+1 so graphing both y=1/3*x+1 and 3x+1 we have something that looks like this: dw:1442275696567:dw the solution is given at the point where both lines touch each other (cross each other; intersect each other)

freckles
 one year ago
Best ResponseYou've already chosen the best response.1dw:1442275792808:dw so this point I darkened is the solution because is the point that two lines have in common

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0wait can u try thing one x2y=2 4x+y=1

freckles
 one year ago
Best ResponseYou've already chosen the best response.1were you trying to write in y=mx+b form to graph the lines to find the point ?

freckles
 one year ago
Best ResponseYou've already chosen the best response.1ok well try writing x2y=2 in that form

freckles
 one year ago
Best ResponseYou've already chosen the best response.1so you subtracted x on both sides and multiplied 1 on both sides? x2y=2 subtracted x on both sides 2y=x2 multiplied both sides by 1 2y=x+2 this is correct so far then just divide both sides by 2

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0then u graph it by going to (0,1) then rise over run

freckles
 one year ago
Best ResponseYou've already chosen the best response.1that sounds great so y=1/2x+1 says the yintercept is 1 and the slope is 1/2 dw:1442276083294:dw right so you get something like this now we also need to graph 4x+y=1 on that same graph

freckles
 one year ago
Best ResponseYou've already chosen the best response.14x+y=1 is equivalent to y=4x+1 can you try graph that we should actually already see the solution even before graphing

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0yea we got 0,1 then rise over run 4/1

freckles
 one year ago
Best ResponseYou've already chosen the best response.1so before graphing you should see that (0,1) is a point on both graphs where both graphs differ in slope therefore (0,1) is the solution

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0yea 0,1 is the slope so we go down 4 and move 1 to the left right?

freckles
 one year ago
Best ResponseYou've already chosen the best response.1(0,1) is the yintercept the slope is 4/1 so we move down from the yintercept 4 units and to the right once

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0Oh right 1 sorry my friend told me left....

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0can u help with one more but this one is substitution

freckles
 one year ago
Best ResponseYou've already chosen the best response.1one more then I have to roll my croissant dough

freckles
 one year ago
Best ResponseYou've already chosen the best response.1replace first y with (2x) solve 4x+2x=24 for x

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0don't you reverse it like y=4x+24 and plug into x y=2(4x+24)

freckles
 one year ago
Best ResponseYou've already chosen the best response.1the second equation says y=2x so you insert that y here: 4x+y=24 to get 4x+2x=24 anyways you can't replace x with 4x+24 because we aren't given x=4x+24 unless you already know that x=8 which x doesn't 8 and also 4x+y=24 is not equivalent to y=4x+24

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0wait how did u get 4x+2x=24

freckles
 one year ago
Best ResponseYou've already chosen the best response.1\[\color{red}{y=2x} \\ 4x+\color{red}{y}=24 \\ \\ 4x+\color{red}{2x}=24\]

freckles
 one year ago
Best ResponseYou've already chosen the best response.1I replaced y with 2x because one of the equations said y=2x

jagr2713
 one year ago
Best ResponseYou've already chosen the best response.0Wait i understand igtg thanks for the help
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.