Wednesday

July 23, 2014

July 23, 2014

Posted by **Dorothy** on Friday, November 5, 2010 at 8:18pm.

x + 3y – z = 2

x – 2y + 3z = 7

x + 2y – 5z = –21

- Algebra -
**Damon**, Friday, November 5, 2010 at 8:30pmx + 3y – z = 2

x – 2y + 3z = 7

------------------

0x +5y -4z = -5

x – 2y + 3z = 7

x + 2y – 5z = –21

-----------------

0x -4y + 8z = 28 or -2y+4z=14

then

+5y -4z = -5

-2y +4z = 14

----------------

3 y +0z = 9

y = 3

now go back up and get x and z

**Related Questions**

Algebra - Solving system of linear equations by using the apropiate method name ...

Algebra....HELP!! - Use the elimination method to solve the system of equations ...

Math - Use elimination to solve each system of equations. x+y-2z=10 8x-9y-z=5 3x...

Math - Use the method of elimination to solve the following system of equations...

Algebra - Solve the following system of equations by the elimination method. 1/...

Algebra II - Explain, in complete sentences, which method you would use to solve...

Math - Use the elimination method to solve the system of equations 5u+2v=15 3u+v...

algebra - i need help with these problems (either a solution or how to plug them...

system of equations - solve using any method and identify the system as ...

algebra - 1 Solve the set of linear equations by the matrix method : a+3b+2c=3...