## anonymous 5 years ago solve the system of equations x+y=7 x-y=3 the answer should be in an ordered pair

1. anonymous

You would solve this by Elimination. Which means that

2. anonymous

Isolate for x in the second equation: x= 3+y. Insert 3+y into the first equation to solve for y: 3+y + y = 7 2y=4 y=2 x=3+2y = 3+ 4 = 7.

3. anonymous

Dang it :P lol

4. anonymous

x+y=7 time (-1) then -x-y=-7 -x-y=-7 ADD x-y=3 ----------------- -2y = -4 y= -4/-2 y=2 subtitution y =2 slove for x x+2=7 x= 7-2 x =5

5. toxicsugar22

x=5,y=-2

6. anonymous

x=5 y=2

7. anonymous

I sure it correct

8. anonymous

how would you graph this?

9. toxicsugar22

yeah ur right it is corect

10. anonymous

The x is the slope and the y is the y intercept (:

11. anonymous

the rest of my question wants to know if this is dependent or independent and alsoconsistent or inconsistent

12. toxicsugar22

it is dependent and it is consistent

13. anonymous

CRAP!! i forgot the definition.... >.<

14. anonymous

can anyone graph it and send me a link so i can see how it should look?

15. anonymous

sorry I wrong page

16. anonymous

u have grid paper?

17. anonymous

no i do it on the computer

18. anonymous

u need rewrite to slope intercept than draw grap on the grid paper,

19. anonymous

Yeah, there was a slight mistake in that I wrote x=3+2y instead of x=3+y. Honestly, graphing a function like this shouldn't be any problem at all. y=x-3. Start at y(0)=-3, y(1)= -2, y(2)=-1, y(3)=0, and so on... Isolate for y, (y=x-3), and insert whatever x you need in order to get the information you need.

20. anonymous

x+y=7 , y= -x +7 x-y=3 , y = x-3

21. anonymous

let me send u grap , u will see intercept at (5,2)

22. anonymous

23. anonymous

sorry y=2 on the grap I write y =3

24. anonymous

25. anonymous

Isn't it a bit more productive to show this person the way to the anser instead of spoonfeeding him?

26. anonymous