## whadduptori 3 years ago What is the solution of the system of equations? somebody please help. I found z i need help with x and y 3x+2y+z= 7 5x+5y+4z=3 3x+2y+3z=1

1. baldymcgee6

What is z?

z=-3

3. baldymcgee6

|dw:1351125106782:dw|

4. baldymcgee6

Now we have x in terms of y... right?

wait where did you get the 3x+2y=10

6. baldymcgee6

7. baldymcgee6

|dw:1351125353226:dw|

8. baldymcgee6

|dw:1351125376339:dw|

oh okay i see now! ok im with you now!

10. baldymcgee6

So if x=10/3 - 2y/3 and z =-3 then we can write 5x+5y+4z=3 5(10/3 - 2y/3) + 5y +4(-3) = 3 We can now solve for y

my friend gave me the answer and x=4 y=-1 and z = -3 i got z but i dont know how she got x and y

12. baldymcgee6

Well I just told you how you can solve for y 5(10/3 - 2y/3) + 5y +4(-3) = 3

13. baldymcgee6

|dw:1351125741476:dw|

and you get the anwser y=-1

15. baldymcgee6

okay, I trust that you did the math and are not just taking your friends answer. So we have z= -3 and y = -1|dw:1351126015670:dw|