# How do you solve the system #x+y+z=-3#, #3x+y-z=13#, and #3x+y-2z=18#?

##### 1 Answer

Apr 25, 2017

The augmented matrix looks something like this:

Then:

Then:

So now we back substitute:

Apr 25, 2017

The augmented matrix looks something like this:

Then:

Then:

So now we back substitute:

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