Question

A system of two linear equations is graphed below.
Create a new equation by setting the left-hand side of the upper equation equal to the right-hand side of the lower equation. Graph the new equation below and enter the new equation in the box to the right.
y=3x+3
2y=2/3x+12. Url where I found this question is https://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/systems-solutions/e/understanding-solution-methods-to-systems-of-equations

Answer 1

Help

Answer 2

It's a systems of equations

Answer 3

If someone explain how to do it than I promise I would other once by myself.

Answer 4

Setting the left-hand side of the upper equation equal to the right-hand side of the lower equation, we get
y=2/3x+12
This is already in slope-intercept form, but the y-intercept of 12 is out of the range of the graph. To graph this equation, let's put it in point-slope form. We could do this by picking any x value and finding the corresponding point on the line. If we pick x=−6 and plug it into the equation, we see that the point (−6,8) lies on the line, and we can rewrite the equation in point-slope form.
(y−8)= 2/3(x+6)
The line goes through the point (−6,8) and has a slope of 2/3.
The problem was I don't get how they solved it.

Answer 5

I don't get it?

Answer 6

I tried to solve it.

Answer 7

A) y=2x−1
B) 2y+x=3

Substituting A into B we get:
2 • (2x -1) +x = 3
4x -2 +x = 3
5x = 5

That video is weird and I have NO idea why it is even there.

Answer 8

Me too. I wish I can look up on youtube. The youtube don't have this kind problem.

Answer 9

This is why I was on this website.

Answer 10

did you tried the procedure of wolf...?

Answer 11

paki - is that question meant for me?

Answer 12

also your equations are wrong... the equations at the link provided are different...

Answer 13

no, that for kk

Answer 14

https://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/systems-solutions/e/understanding-solution-methods-to-systems-of-equations

Answer 15

now it shows some other equations....

Answer 16

brb

Answer 17

Who ever help me. I will best response to him.

Answer 18

I have no word

Answer 19

i got x=1...

Answer 20

I have NO idea why this asks you to create a third equation.
When solving simultaneous equations you need two DIFFERENT equations.
If you have 2x + 3x = 7 you CANNOT solve it by multiplying it by by 2 or whatever other number.

Answer 21

It said write a new equation. lol x=1 is new equation???

Answer 22

This is what they say substitution and elimination always produce equations consistent with the solution of the original system.

Answer 23

hmm got it... let me solve now

Answer 24

Setting the left-hand sides of these equations equal to each other, we get
y = (2/3)x+12.
this equation is now in slop intercept form....

Answer 25

A restaurant charges $11 for a buffet plus $2 for each drink. Another restaurant charges $14 for a buffet plus $1 for each drink. The system of equations is graphed below.
Part 1: What is the solution?
Part 2: Show your work to verify the solution for both equations pleasehelp me someone

Answer 26

I know that and I tired to solve.

Answer 27

pinappleloveraries What are you doing posting that here?

Answer 28

then,,,?

Answer 29

that is the new equation.... now just plot the new line graph,,, and that's all...

Answer 30

i need help or i will fail please @wolf1728

Answer 31

pinappleloveraries - you should start a NEW question and not just interrupt another question

Answer 32

I'm leaving here - this question is just to strange.

Answer 33

now please close this question... thank you..

Answer 34

@wolf1728 are you rude...?

Answer 35

(y−8)=2/3(x+6 What told the answer. And it is no solution.

Answer 36

Still don't get how they got (y-8)=2/3(x+6) form?