Question

Find the solution using Gaussin Elimination method:
x-2y+z=6
y+2z=-7
x+y+3z=-7

Answer 1

step 1) add all three equations
step 2) subtract the second equation from the third equation
step 3) post what you got here.

Answer 2

okay so from adding up the three equations, i got 2x+2y+6z=-8. is that what i am subtracting from the second equation from? or is it the original 3rd equation i am using

Answer 3

so you added the three equations is it?
what is -2y + y +y ?

Answer 4

okay so from adding up the three equations, i got 2x+2y+6z=-8. is that what i am subtracting from the second equation from? or is it the original 3rd equation i am using

Answer 5

0

Answer 6

then how did you get 2y when you added the three equations?

Answer 7

okay so from adding up the three equations, i got 2x+2y+6z=-8. is that what i am subtracting from the second equation from? or is it the original 3rd equation i am using

Answer 8

oh i read the last equation wrong at first

Answer 9

okay. follow the steps and do the calculations correctly and post what you get here.
also, in the second step, subract the original 2nd equation from the original third equation.