Question 66229This question is from textbook An Incremental Development
: please help to solve
2x - y - z = -5
-2x + 2y - z = 5
x + 3y + z = 6
This question is from textbook An Incremental Development
Answer by venugopalramana(3286)   (Show Source):
You can put this solution on YOUR website! F YOU WANT SOLUTION BY ELIMINATION
SEE THE FOLLOWING EXAMPLE ND TRY.IN CASE OF DIFFICULTY
PLEASE COME BACK
equations with 3 linear
variables
6x-4y+5z=31
5x+2y+2z=13
x+y+z=2
should you multiply the 2nd equation by 2?
show work
1 solutions
Answer 29601 by venugopalramana(2734) About Me on
2006-07-04 11:53:09 (Show Source):
You can put this solution on YOUR website!
OK..THE PROBLEM,WE FACE IN ANSWERING IS THAT WE ARE
NOT AWARE OF YOUR COURSE OF STUDY AND BACKGROUND.THE
SOLUTION I GAVE IS BY GAUSS JORDAN ELIMINATION METHOD
USED IN MATRICES AS WANTED BY SOME STUDENTS.IF YOU ARE
NOT TAUGHT THAT ,WE SHALL DO BY NORMAL ELIMINATION.
equations with 3 linear variables
6x-4y+5z=31.......................................I
5x+2y+2z=13...........................II
x+y+z=2.......................III
EQN.II - 2*EQN.III
5X+2Y+2Z-2X-2Y-2Z=13-2*2=9
3X=9
X=9/3=3
EQN.I+4*EQN.III
6X-4Y+5Z+4X+4Y+4Z=31+4*2=39
10X+9Z=39...BUT...X=3..SO
10*3+9Z=39
9Z=39-30=9
Z=9/9=1
PUTTING IN EQN.III
3+Y+1=2
Y=2-4=-2
HOPE YOU UNDERSTOOD.
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