Question

Which expression gives the x-coordinate of the solution of the system?
3x-y+z=9
x+2y+z=3
5x+6y+2x=2

Answer 1

@dan815

Answer 2

the answer is in matrix form but im confused

Answer 3

I am confused too. What is the original system?

Answer 4

what?

Answer 5

@uri

Answer 6

@confluxepic

Answer 7

@undeadknight26

Answer 8

What is the answer then?

Answer 9

idk

Answer 10

im asking for help

Answer 11

The first and second equation are normal but the third equation has one x in the z position. Combine the the two x's in the third equation into one then do Gaussian elimination.