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Solve the Follwing system of equations

Asked Jul 5, 2007, 02:29 PM — 2 Answers
Hey I need so help bad!
3x=-12
1=x+y+2z
2x-y=-9
I have tried the 5 or six times but I can never get the right answer...
I need help...

Sorry I forgot to add the 2z...

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2 Answers
vball43's Avatar
vball43 Posts: 76, Reputation: 19
Junior Member
  
#2

Jul 5, 2007, 02:37 PM
x=-4
y=-10
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makdan's Avatar
makdan Posts: 48, Reputation: 10
Junior Member
  
#3

Jul 7, 2007, 10:37 AM
Quote:
Originally Posted by Sharpe
Hey I need so help bad!
3x=-12
1=x+y+2z
2x-y=-9
I have tried the 5 or six times but I can never get the right answer...
I need help...

Sorry I forgot to add the 2z...
From Eq 1, x = -4.

In Eq 3, substitute -4 for x, and solve for why =1.

In Eq 2, substitute known values for x and why, and solve for z.
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