Thursday

April 17, 2014

April 17, 2014

Posted by **ann :)** on Thursday, September 13, 2012 at 7:25pm.

x+y-z=-4 (2)

3x+5y+z=0 (3)

solve the system

need help quick!

- college algebra -
**Reiny**, Thursday, September 13, 2012 at 7:43pmadd the last two:

4x + 6y = -4

from the 1st: y = -2-2x

sub into above new equation:

4x + 6(-2-2x) = -4

4x - 12 - 12x = -4

-8x = 8

x = -1

then y = -2+2 = 0

in the 2nd:

x+y-z=-4

-1+0-z=-4

-z=-3

z=3

x=-1

y=0

z=3

- college algebra -
**ann :)**, Thursday, September 13, 2012 at 7:48pm12x+4y+2z=-7 (1)

3x-12y+6z=-4 (2)

9x-16y+4z=-3 (3)

solve the system

just need the steps how to do it

**Related Questions**

algebra - addition method:3x-5y=-2 and 5y-2x=-2 how would I solve it since they ...

algebra - 3x+5y=0 2x-5y=-9 idk how 2 solve it then graph it my teacher eont help...

algebra - Solve the system of equations: what is the y-value in the solution? ...

Math - Please show the solutions! 1.) x+y-2(2x-3y) 2.) x+y/2 - 3x-y/4 + x-5y/8 3...

Algebra 2 - Solve: 2x+y+z=-2 2x-y+3z=6 3x-5y+4z=7

Algebra - Checking a few answers to some algebra problems: 1.Find the slope of ...

Algebra 2 - Choose the appropriate simplified expression. 1. 8x^2-10x+3/6x^2+3x-...

Algebra - i forgot how to solve these types of problems.. 2x^2-18x=0, x^2=6x+7, ...

Math - solve each system 1) 3x + y = 6 2x + 3y = 13 2) 2x + 5y - 6 = 0 -2x + y...

algebra - solve; 3x-y=-5, -2x+5y=-14