Topic:Systems with three variables
directions: solve the system using any method.
Problem:
3x+2y+2z=13
2x+y-z= -5
x-3y+z= -16
~Please show all work and answers clearly!

Question

Topic:Systems with three variables 
directions: solve the system using any method.
Problem: 
3x+2y+2z=13
2x+y-z= -5
x-3y+z= -16
~Please show all work and answers clearly!

ranga · Answer

Pick one variable to eliminate.  Let us pick z.
If you multiply the second equation by -2 and add it to the first equation, z will be eliminated and you will have one equation with just x and y.  We need one more.
Add the second and third equation and you will eliminate z again and you will have the second equation with just x and y.  Use the two equations to solve for x and y.  Then solve for z.

ranga · Answer

Should be: If you multiply the second equation by 2   (2 not -2)

anonymous · Answer

I know how to do it. I just want someone to do it for me because its one less problem I have to do.

ranga · Answer

Well, if you are looking for someone to do your homework maybe someone else will jump in.

anonymous · Answer

wow rude

ranga · Answer

Not rude.  People volunteer here to help students learn.  But you are saying you are not asking the question to learn just to have others do your work.  I am saying that is not the reason I am here but there may be others willing to do just that.