SOLUTION: -4x+4z=24 6x+2y=-4 3y+4z=28

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Question 1152619: -4x+4z=24
6x+2y=-4
3y+4z=28
Found 2 solutions by MathLover1, Alan3354:
Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!

......eq.1
......eq.2
......eq.3
--------------------------

......eq.1....solve for
........1a
......eq.3...solve for
........3a
from 1a and 3a we have
....solve for



.........2a
go to
......eq.2, substitute from 2a



.....both side multiply by




go to 2a, plug in




go to 1a, plug in
........1a

solutions:
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
-4x+4z=24
6x+2y=-4
3y+4z=28
===============
I would use elimination.
-4x + 0y + 4z = 24
 0x + 3y + 4z = 28
---------------------- Subtract
-4x - 3y = -4 --- Eqn A
Now you have 2 eqns in x & y
================
 6x + 2y = -4
Divide by 2
 3x + 1y = -2
Multiply by 3
 9x + 3y = -6
-4x - 3y = -4 --- Eqn A
-------------------------------------- Add
5x = -10
x = -2
===============

Sub for x in Eqn A to find y
-4x+4z=24
Sub for x to find z

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