SOLUTION: solve step by step to solve linear equation with 3 variables, can you help me solve this step by step please? 2x-4y-z=17 x+2y-z=0 4x-y-z=6

Question 753656: solve step by step to solve linear equation with 3 variables, can you help me solve this step by step please?
2x-4y-z=17
x+2y-z=0
4x-y-z=6
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
...eq.1
...eq.2
...eq.3
_________________________
...eq.2..solve for

...eq.2a.......substitute in .eq.1

...eq.1

....solve for
....eq.1a
go to ...eq.2a and substitute

........eq.2b
go to ...eq.3 and substitute from eq.1a and from eq.2b
.....solve for

go back to ........eq.2b and find

go back to ....eq.1a and find

check:
...eq.2..plug in ,, and

which confirms our solutions

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