anonymous
  • anonymous
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
Mathematics
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anonymous
  • anonymous
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
Mathematics
jamiebookeater
  • jamiebookeater
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baldymcgee6
  • baldymcgee6
What is z?
anonymous
  • anonymous
z=-3
baldymcgee6
  • baldymcgee6
|dw:1351125106782:dw|

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baldymcgee6
  • baldymcgee6
Now we have x in terms of y... right?
anonymous
  • anonymous
wait where did you get the 3x+2y=10
baldymcgee6
  • baldymcgee6
Adding 3 to both sides
baldymcgee6
  • baldymcgee6
|dw:1351125353226:dw|
baldymcgee6
  • baldymcgee6
|dw:1351125376339:dw|
anonymous
  • anonymous
oh okay i see now! ok im with you now!
baldymcgee6
  • 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
anonymous
  • anonymous
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
baldymcgee6
  • baldymcgee6
Well I just told you how you can solve for y 5(10/3 - 2y/3) + 5y +4(-3) = 3
baldymcgee6
  • baldymcgee6
|dw:1351125741476:dw|
anonymous
  • anonymous
and you get the anwser y=-1
baldymcgee6
  • 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|

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