What is the solution of the following system?

3x+2y+z=7
5x+5y+4z=3
3x+2y+3z=1

Question

What is the solution of the following system?

3x+2y+z=7
5x+5y+4z=3
3x+2y+3z=1

anonymous · Answer

Are you familiar with crammar's principle in matrices? Makes it very very simple to solve

john_es · Answer

May be with eliminatino method (Gauss Jordan method)?

john_es · Answer

Anyways, try elimination method. The solution is, x=4, y=-1, z=-3. If you need step by step, tell it.

anonymous · Answer

Yeah, the elim takes forever on 3 variable haha

john_es · Answer

May be in this system is a little faster :).

anonymous · Answer

Lol yea, it's already feasible to negate one by multiplying -1

john_es · Answer

Exact, the first row and the third are very pretty.

anonymous · Answer

hah!!

anonymous · Answer

I need step by step. :( Thanks to the both of you! :)

tkhunny · Answer

Here's the plan, this sort of thing is amazingly tedious and requires the greatest of YOUR care.  It is hoped that no one will show you step-by-step.  You will not learn to be careful under those circumstances.

Please suggest YOUR plan and the method YOU intend to use.