Question

Hey guys I need help with Elimination method of
4y+2x=18
3x+6y=26

Answer 1

what do you have to find?

Answer 2

I have to solve using the elimination method.

Answer 3

What you need to do to start with is arrange one of the equations into the form y=... or x=... and then substitute it into the other equation. which one would you like to start with?

Answer 4

So far I know I multiply
3 to the top equation
And -2 to the bottom equation

Answer 5

cool, do you know why you do this multiplication?

Answer 6

I have
3*2x+4y=18*3
Equals
6x+4y=54

Answer 7

No ..I don't :/

Answer 8

The point is to eliminate one of the x's or y's from the equation, then it makes it easy to solve it right?

Answer 9

Ok I got you .

Answer 10

You multiply the whole equations so that you get the same number of x or the same number of y on each line, then they can cancel each other out.

Answer 11

so if you multiply the top by 3, you get 12y+6x=54
and the bottom by -2 you get -6x -12y = -52

Answer 12

which is where you were at.. still following?

Answer 13

Ok I know for the 2nd equation they cancel out
-2*3x+6y=26*-2
Equals
6x+6y=24y
And they cancel out

Answer 14

Wait I'm wrong aren't i..

Answer 15

yeah i'm just trying to follow your math, hold on

Answer 16

this one is tricky because both the x's and y's cancel each other out. are you sure you have it written down right?

Answer 17

Yes question #4

Answer 18

are you sure its elimination? substitution would be much easier

Answer 19

It says "solve using the elimination method"

Answer 20

Are you able to help me ?

Answer 21

it has me stumped. can you show me whole of the question?

Answer 22

it looks like it says substitution up the top

Answer 23

Question # 4

Answer 24

ok, so the way i can see this working if you start back with this:
so if you multiply the top by 3, you get 12y+ 6x = 54
and the bottom by -2 you get -6x -12y = -52
you followed up to this point right?

Answer 25

My conclusion is that there is no solution. I'll post my working shortly.

Answer 26

Ok because I am so confused lol

Answer 27

uploaded below. perhaps there is a typo in the question.

Answer 28

Oh wow . Ok , so is that what I tell my instructor ?

Answer 29

do you know how to draw graphs?

Answer 30

Not really .. I'm sorry I'm just now starting to understand this math thing .

Answer 31

You should tell your instructor that you can't solve this using the elimination method. You've talked to some other people who have done university maths, and they can't solve it using the elimination method or the substitution method. When both of these equations are shown on a graph, there is no point where the two lines intersect - so no real values of x and y where both equations are solved. So the equations are ok on their own, but there is no solution.

Answer 32

Ok great , Thank you soo much !! You're awesome ! Helped me a lot

Answer 33

you can have a look at the graphs on dismiss.com, i've also posted the picture showing the two lines don't intersect

Answer 34

screenshot here.

Answer 35

any other time you're trying to check your simultaneous equations, you can write them in and check them here too - its great if you're a visual learner

Answer 36

Yes ! I am actually a visual learner do this will definitely help me .

Answer 37

Do you have time for another question ? Last one