anonymous one year ago What is the y-intercept of the equation 2x + 3y = 12? -2/3 4 6 12

1. Astrophysics

Hey set it up in y = mx+b (b = y - intercept) format that way you will be able to see the y - intercept clearly.

2. Astrophysics

So solve for y, do you know how to do that?

3. anonymous

yes

4. ganeshie8

do it

5. anonymous

ok

6. ganeshie8

2x + 3y = 12 start by subtracting 2x both sides

7. Astrophysics

What do you mean

8. anonymous

u - 2x from 12 =10 2x - 3y and u get 1y

9. ganeshie8

remember this in algebra : you can't add/subtract apples and coconuts

10. ganeshie8

2x + 3y = 12 subtracting 2x both sides : 2x + 3y = 12 -2x -2x you should get : 3y = 12 - 2x

11. anonymous

ok

12. ganeshie8

but "y" still has that 3 attached to it how to get rid of that 3 ?

13. Astrophysics

Often for these algebraic problems to move something to the other side we use the opposite operation of what already exists, so since there's a 3 attached to the y, which means it's being multiplied. What can we do to get rid of the 3?

14. Astrophysics

Don't worry about being wrong, say what ever is on your mind it's ok

15. anonymous

c

16. anonymous

its b

17. anonymous

i am not doing that

18. Astrophysics

Yeah that's much better...haha divide both sides by 3

19. Astrophysics

I've been up for 24+ hours so that's my queue xD

20. anonymous

i did not delete your things

21. Astrophysics

I know I did

22. anonymous

ok

23. ganeshie8

hey just one moment

24. Astrophysics

Let me do the algebra quickly to...

25. ganeshie8

4 is correct, but may i know this : when you said below, what were you thinking ? |dw:1440084673397:dw|

26. Astrophysics

3y=12-2x y=(12-2x)/3 y= -2x/3+4 works out

27. anonymous

me or him

28. Astrophysics

$$\color{blue}{\text{Originally Posted by}}$$ @ltj1234 u have 10 1 y left $$\color{blue}{\text{End of Quote}}$$ Ganeshie is asking you what you meant by your comment here

29. anonymous

o ok

30. ganeshie8

yes you @ltj1234

31. anonymous

idk

32. Astrophysics

The 10 I think you were trying to subtract 2x from 12, but you can't do that since there is a variable (x)

33. ganeshie8

sure you know it ^

34. ganeshie8

when you have 12 - 2x, you leave it like that you can't say that equals 10 because they are not "like terms" nevertheless, it was really a very good attempt from your side! keep it up!

35. anonymous

ok

36. Astrophysics

For sure, good job @ltj1234

37. anonymous

thanks